> For the complete documentation index, see [llms.txt](/llms.txt).
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439 endpoints

# Math API

Percentage, unit conversion, geometry, and sequences. Same bearer token, same credit pool, same JSON envelope as every other endpoint — drop them into apps, sites, workflows, or agents without rebuilding formulas, validation, or docs.
[Start free →](/billing/checkout/?plan=free) [View OpenAPI](/v1/docs) [All categories](/tools/)
Advanced
[
Complementary Error Function Calculator complementary-error-function-calculator
Calculate erf(x), erfc(x), and related error-function values.
1cr · v2026-04-22
](/tools/complementary-error-function-calculator/) [
Exponential Decay Calculator exponential-decay-calculator
Solve continuous exponential decay equations for final amount, initial amount, rate, or time.
1cr · v2026-04-22
](/tools/exponential-decay-calculator/) [
Exponential Growth Calculator exponential-growth-calculator
Solve continuous exponential growth equations for final amount, initial amount, rate, or time.
1cr · v2026-04-22
](/tools/exponential-growth-calculator/)
Advanced Math
[
Antilog Calculator antilog-calculator
Calculate an antilogarithm as base raised to an exponent.
1cr · v2026-04-22
](/tools/antilog-calculator/) [
Error Function Calculator error-function-calculator
Evaluate erf, erfc, inverse erf, and inverse erfc for bounded inputs.
1cr · v2026-04-22
](/tools/error-function-calculator/) [
Gamma Function Calculator gamma-function-calculator
Evaluate the gamma function for bounded real inputs.
1cr · v2026-04-22
](/tools/gamma-function-calculator/)
Algebra
[
Absolute Value Equation Solver absolute-value-equation-solver
Solve equations of the form |a*x + b| = c.
1cr · v2026-04-22
](/tools/absolute-value-equation-solver/) [
Absolute Value Inequality Solver absolute-value-inequality-solver
Solve inequalities of the form |a*x + b| compared with c.
1cr · v2026-04-22
](/tools/absolute-value-inequality-solver/) [
Binomial Theorem Expansion Calculator binomial-theorem-expansion-calculator
Expand (a + b)^n for n up to 50 with every coefficient and term listed.
1cr · v2026-04-22
](/tools/binomial-theorem-expansion-calculator/) [
Completing the Square Calculator completing-the-square-calculator
Convert a quadratic to vertex form and solve by completing the square.
1cr · v2026-04-22
](/tools/completing-the-square-calculator/) [
Cubic Equation Solver cubic-equation-solver
Solve ax^3 + bx^2 + cx + d = 0 and return all real or complex roots.
1cr · v2026-04-22
](/tools/cubic-equation-solver/) [
Descartes' Rule of Signs Calculator descartes-rule-of-signs-calculator
Possible counts of positive and negative real roots of a polynomial via sign changes in f(x) and f(-x), with the full root-count table.
1cr · v2026-04-22
](/tools/descartes-rule-of-signs-calculator/) [
Distance-Speed-Time Triangle Calculator distance-speed-time-triangle-calculator
Solve distance, speed, or time from the other two, plus multi-leg average speed and round-trip harmonic mean.
1cr · v2026-04-22
](/tools/distance-speed-time-triangle-calculator/) [
Expand Polynomials Calculator expand-polynomials-calculator
Expand a product of polynomial factors (optionally raised to a power) into standard form with exact rational coefficients.
1cr · v2026-04-22
](/tools/expand-polynomials-calculator/) [
Linear Equation Solver linear-equation-solver
Solve a linear equation in the form ax + b = c.
1cr · v2026-04-22
](/tools/linear-equation-solver/) [
Linear Programming Solver linear-programming-solver
Solve a linear program by two-phase simplex in exact rational arithmetic, with slacks and binding constraints.
1cr · v2026-04-22
](/tools/linear-programming-solver/) [
Parabola Calculator parabola-calculator
Analyze a quadratic parabola from coefficients a, b, and c.
1cr · v2026-04-22
](/tools/parabola-calculator/) [
Partial Fraction Decomposition Calculator partial-fraction-decomposition-calculator
Decompose a rational expression into partial fractions.
1cr · v2026-04-22
](/tools/partial-fraction-decomposition-calculator/) [
Point Slope Form Calculator point-slope-form-calculator
Build point-slope, slope-intercept, and standard-form line equations.
1cr · v2026-04-22
](/tools/point-slope-form-calculator/) [
Polynomial Factoring Calculator polynomial-factoring-calculator
Factor a polynomial over the rationals: content, rational roots with multiplicity, linear factors, and any irreducible remainder.
1cr · v2026-04-22
](/tools/polynomial-factoring-calculator/) [
Polynomial Long Division Calculator polynomial-long-division-calculator
Divide one polynomial by another with exact rational arithmetic, returning quotient, remainder, and step-by-step subtraction.
1cr · v2026-04-22
](/tools/polynomial-long-division-calculator/) [
Polynomial Roots Calculator polynomial-roots-calculator
Real and complex roots of a polynomial (degree up to 12) via exact formulas or Durand-Kerner iteration.
1cr · v2026-04-22
](/tools/polynomial-roots-calculator/) [
Quadratic Formula Calculator quadratic-formula-calculator
Solve quadratic roots with discriminant and vertex details.
1cr · v2026-04-22
](/tools/quadratic-formula-calculator/) [
Slope Intercept Form Calculator slope-intercept-form-calculator
Build slope-intercept and standard-form line equations from m and b.
1cr · v2026-04-22
](/tools/slope-intercept-form-calculator/) [
Square Root Calculator square-root-calculator
Calculate the principal and negative square roots of a non-negative number.
1cr · v2026-04-22
](/tools/square-root-calculator/) [
Standard Form to Slope Intercept Converter standard-form-to-slope-intercept-converter
Convert Ax + By = C into slope-intercept form when possible.
1cr · v2026-04-22
](/tools/standard-form-to-slope-intercept-converter/) [
Synthetic Division Calculator synthetic-division-calculator
Divide polynomial coefficients by x minus a using synthetic division.
1cr · v2026-04-22
](/tools/synthetic-division-calculator/) [
System of Linear Equations Solver system-of-linear-equations-solver
Solve n x n linear systems (2 to 8 unknowns) exactly, including parametric infinite-solution forms.
1cr · v2026-04-22
](/tools/system-of-linear-equations-solver/) [
X and Y Intercept Calculator x-y-intercept-calculator
Find x- and y-intercepts for a linear equation ax + by + c = 0.
1cr · v2026-04-22
](/tools/x-y-intercept-calculator/)
Algebra Calculators
[
Vertex and Axis of Symmetry Calculator vertex-axis-calculator
Find the vertex and axis of symmetry for a quadratic ax^2 + bx + c.
1cr · v2026-04-22
](/tools/vertex-axis-calculator/)
Analytic Geometry
[
Parallel and Perpendicular Line Calculator parallel-and-perpendicular-line-calculator
Find parallel and perpendicular lines through a given point.
1cr · v2026-04-22
](/tools/parallel-and-perpendicular-line-calculator/)
Angles
[
Radian to Degree Converter radian-to-degree-converter
Convert radians, fractions, or pi expressions to degrees.
1cr · v2026-04-22
](/tools/radian-to-degree-converter/)
Area
[
Acreage Calculator acreage-calculator
Calculate land acreage from rectangle, triangle, or circle dimensions.
1cr · v2026-04-22
](/tools/acreage-calculator/) [
Hectares to Acres Converter hectares-to-acres-converter
Convert hectares to acres and related land-area units.
1cr · v2026-04-22
](/tools/hectares-to-acres-converter/) [
Square Feet to Acres Converter square-feet-to-acres-converter
Convert square feet to acres and related land-area units.
1cr · v2026-04-22
](/tools/square-feet-to-acres-converter/) [
Square Footage Calculator square-footage-calculator
Calculate square footage for common room, lot, and curved shapes.
1cr · v2026-04-22
](/tools/square-footage-calculator/) [
Square Meters to Acres Converter square-meters-to-acres-converter
Convert square meters to acres and related land-area units.
1cr · v2026-04-22
](/tools/square-meters-to-acres-converter/) [
Square Miles to Acres Converter square-miles-to-acres-converter
Convert square miles to acres and related land-area units.
1cr · v2026-04-22
](/tools/square-miles-to-acres-converter/)
Arithmetic
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Long Addition and Subtraction Calculator long-addition-and-subtraction-calculator
Add or subtract large integers and return aligned column output.
1cr · v2026-04-22
](/tools/long-addition-and-subtraction-calculator/) [
Multiplication Calculator multiplication-calculator
Multiply a list of numbers exactly, without floating-point drift.
1cr · v2026-04-22
](/tools/multiplication-calculator/) [
Order of Operations Calculator PEMDAS order-of-operations-calculator-pemdas
Evaluate arithmetic expressions using standard PEMDAS precedence.
1cr · v2026-04-22
](/tools/order-of-operations-calculator-pemdas/)
Audio
[
BPM to Millisecond Delay Calculator bpm-to-ms-delay-calculator
Convert tempo in BPM into synchronized straight, dotted, and triplet delay times.
1cr · v2026-04-22
](/tools/bpm-to-ms-delay-calculator/)
Basic Math
[
Absolute Value Calculator absolute-value-calculator
Calculate the absolute value of a real or complex number.
1cr · v2026-04-22
](/tools/absolute-value-calculator/) [
Cube and Cube Root Calculator cube-and-cube-root-calculator
Calculate a number's cube and cube root.
1cr · v2026-04-22
](/tools/cube-and-cube-root-calculator/) [
Cube Root Calculator cube-root-calculator
Calculate the real cube root of a finite number.
1cr · v2026-04-22
](/tools/cube-root-calculator/) [
Even or Odd Number Checker even-or-odd-number-checker
Check whether one or more integers are even or odd.
1cr · v2026-04-22
](/tools/even-or-odd-number-checker/) [
First n Digits of e first-n-digits-of-e
First n digits of Euler's number e (Decimal series sum 1/n!) with digit-frequency analysis.
1cr · v2026-04-22
](/tools/first-n-digits-of-e/) [
First n Digits of Pi first-n-digits-of-pi
First n digits of pi (Chudnovsky series, exact via Decimal) with digit-frequency analysis.
1cr · v2026-04-22
](/tools/first-n-digits-of-pi/) [
Long Division Calculator long-division-calculator
Calculate quotient, remainder, decimal expansion, and long division steps.
1cr · v2026-04-22
](/tools/long-division-calculator/) [
Long Multiplication Calculator long-multiplication-calculator
Calculate a product with long multiplication partial products.
1cr · v2026-04-22
](/tools/long-multiplication-calculator/) [
Nth Root Calculator nth-root-calculator
High-precision nth roots (up to 100 decimals) with exact-root detection and verification.
1cr · v2026-04-22
](/tools/nth-root-calculator/) [
Number of Digits number-of-digits
Count the digits of any integer with digit frequency, palindrome check, and scientific notation.
1cr · v2026-04-22
](/tools/number-of-digits/) [
Quotient and Remainder Calculator quotient-and-remainder-calculator
Compute the integer quotient and remainder of a division with verification.
1cr · v2026-04-22
](/tools/quotient-and-remainder-calculator/) [
Sum Calculator sum-calculator
High-precision decimal sum of up to 5000 numbers with average, median, and sign statistics.
1cr · v2026-04-22
](/tools/sum-calculator/)
Calculus
[
Average Rate of Change Calculator average-rate-of-change-calculator
Compute the average rate of change of f(x) on [a, b] with the secant line equation.
1cr · v2026-04-22
](/tools/average-rate-of-change-calculator/) [
Bernoulli ODE Solver bernoulli-ode-solver
Solve y' + p·y = q·y^n by the v = y^(1-n) substitution, with the linearised form and an RK4 cross-check.
1cr · v2026-04-22
](/tools/bernoulli-ode-solver/) [
Curl Calculator curl-calculator
Compute the curl of a 3D vector field (or the scalar curl in 2D) with optional evaluation at a point.
1cr · v2026-04-22
](/tools/curl-calculator/) [
Curvature Calculator curvature-calculator
Calculate curvature and radius of curvature for a quadratic function.
1cr · v2026-04-22
](/tools/curvature-calculator/) [
Directional Derivative Calculator directional-derivative-calculator
Compute the directional derivative of a function along a direction vector, with the maximum rate of change.
1cr · v2026-04-22
](/tools/directional-derivative-calculator/) [
Divergence Calculator divergence-calculator
Compute the divergence of a 2D or 3D vector field, with per-term partials and source/sink classification.
1cr · v2026-04-22
](/tools/divergence-calculator/) [
Double Integral Calculator double-integral-calculator
Evaluate an iterated double integral over rectangular or variable-limit regions.
1cr · v2026-04-22
](/tools/double-integral-calculator/) [
Euler's Method Calculator euler-s-method-calculator
Step an initial value problem forward with explicit Euler, with a full table and optional exact-solution error.
1cr · v2026-04-22
](/tools/euler-s-method-calculator/) [
Fast Fourier Transform (FFT) Calculator fast-fourier-transform-fft-calculator
Discrete Fourier transform of a sample list by radix-2 FFT, with magnitude, phase and the dominant frequency.
1cr · v2026-04-22
](/tools/fast-fourier-transform-fft-calculator/) [
First Order ODE Solver first-order-ode-solver
Classify and solve y' = f(x, y): closed form for constant-coefficient linear equations plus an RK4 solution table and slope field.
1cr · v2026-04-22
](/tools/first-order-ode-solver/) [
Fourier Series Coefficients Calculator fourier-series-coefficients-calculator
Fourier coefficients a0, a_n and b_n for a function over one period, with amplitude, phase and symmetry detection.
1cr · v2026-04-22
](/tools/fourier-series-coefficients-calculator/) [
Gradient Calculator (Multivariable) gradient-calculator-multivariable
Compute the gradient vector of a multivariable function, with optional evaluation, magnitude, and direction at a point.
1cr · v2026-04-22
](/tools/gradient-calculator-multivariable/) [
Implicit Derivative Calculator implicit-derivative-calculator
Differentiate an implicit equation to first, second, or third order using the partial-derivative quotient.
1cr · v2026-04-22
](/tools/implicit-derivative-calculator/) [
Infinite Series Sum Calculator infinite-series-sum-calculator
Closed-form sums for classic infinite series: geometric, p-series, telescoping, alternating harmonic, Leibniz, Basel, e^x, and alternating p-series.
1cr · v2026-04-22
](/tools/infinite-series-sum-calculator/) [
Inverse Laplace Transform Calculator inverse-laplace-transform-calculator
Invert a proper rational Laplace transform by exact partial fractions, including repeated and complex poles.
1cr · v2026-04-22
](/tools/inverse-laplace-transform-calculator/) [
Jacobian Matrix Calculator jacobian-matrix-calculator
Build the Jacobian matrix of a vector-valued function, with the symbolic determinant when it is square.
1cr · v2026-04-22
](/tools/jacobian-matrix-calculator/) [
L'Hopital's Rule Calculator l-h-pital-s-rule-calculator
Resolve 0/0 and infinity/infinity limits by repeated differentiation, showing each application of the rule.
1cr · v2026-04-22
](/tools/l-h-pital-s-rule-calculator/) [
Laplace Transform Calculator laplace-transform-calculator
Laplace transform of a sum of powers, exponentials and trigonometric terms, with the region of convergence.
1cr · v2026-04-22
](/tools/laplace-transform-calculator/) [
Line Integral Calculator line-integral-calculator
Evaluate scalar or vector line integrals along a parametric curve, with arc length and conservative-field check.
1cr · v2026-04-22
](/tools/line-integral-calculator/) [
Maclaurin Series Calculator maclaurin-series-calculator
Exact-coefficient Maclaurin (Taylor at 0) series expansion for common functions, with optional evaluation.
1cr · v2026-04-22
](/tools/maclaurin-series-calculator/) [
Partial Derivative Calculator partial-derivative-calculator
Differentiate a symbolic expression with respect to x, y, z, or t.
1cr · v2026-04-22
](/tools/partial-derivative-calculator/) [
Second Order ODE Solver second-order-ode-solver
Solve a·y'' + b·y' + c·y = 0 from the characteristic equation, with the initial-value constants and damping ratio.
1cr · v2026-04-22
](/tools/second-order-ode-solver/) [
Series Convergence Test Calculator series-convergence-test-calculator
Convergence verdict (absolute/conditional/divergent) for common series families with ratio, root, and divergence test estimates.
1cr · v2026-04-22
](/tools/series-convergence-test-calculator/) [
Taylor Series Calculator taylor-series-calculator
Taylor series expansion of common functions about any center a, using exact shifted-derivative formulas, with optional evaluation.
1cr · v2026-04-22
](/tools/taylor-series-calculator/)
Charts
[
Bar Graph Maker bar-graph-maker
Prepare normalized bar-chart data from labels and numeric values.
1cr · v2026-04-22
](/tools/bar-graph-maker/)
Combinatorics
[
Binomial Coefficient Calculator binomial-coefficient-calculator
Calculate C(n, k), the number of combinations choosing k items from n.
1cr · v2026-04-22
](/tools/binomial-coefficient-calculator/) [
Combination Calculator combination-calculator
Calculate combinations C(n, k).
1cr · v2026-04-22
](/tools/combination-calculator/) [
Derangement (Subfactorial) Calculator derangement-subfactorial-calculator
Calculate the number of derangements (subfactorial!n) for n elements.
1cr · v2026-04-22
](/tools/derangement-subfactorial-calculator/) [
Permutation Calculator permutation-calculator
Calculate P(n,r), where order matters and repetition is not allowed.
1cr · v2026-04-22
](/tools/permutation-calculator/) [
Permutations with Repetition Calculator permutations-with-repetition-calculator
Calculate n^r ordered arrangements where items can repeat.
1cr · v2026-04-22
](/tools/permutations-with-repetition-calculator/) [
Stirling Numbers Calculator stirling-numbers-calculator
Calculate unsigned Stirling numbers of the first kind and Stirling numbers of the second kind.
1cr · v2026-04-22
](/tools/stirling-numbers-calculator/)
Complex Numbers
[
Complex Numbers Calculator complex-numbers-calculator
Add, subtract, multiply, or divide two complex numbers.
1cr · v2026-04-22
](/tools/complex-numbers-calculator/)
Conics
[
Hyperbola Calculator hyperbola-calculator
Calculate standard-form hyperbola vertices, foci, eccentricity, and asymptotes.
1cr · v2026-04-22
](/tools/hyperbola-calculator/)
Construction
[
Flooring Calculator flooring-calculator
Estimate flooring material units, waste allowance, and optional cost.
1cr · v2026-04-22
](/tools/flooring-calculator/) [
Insulation Calculator insulation-calculator
Estimate insulation R-value target, thickness, material quantity, and cost range.
1cr · v2026-04-22
](/tools/insulation-calculator/) [
Paver Calculator paver-calculator
Estimate paving stones needed for a rectangular project area.
1cr · v2026-04-22
](/tools/paver-calculator/)
Cooking
[
Butter to Oil Converter butter-to-oil-converter
Convert butter quantities to practical oil equivalents for baking.
1cr · v2026-04-22
](/tools/butter-to-oil-converter/)
Coordinate Geometry
[
Polar to Cartesian Converter polar-to-cartesian-converter
Convert polar coordinates to Cartesian x and y coordinates.
1cr · v2026-04-22
](/tools/polar-to-cartesian-converter/)
Education
[
Final Grade Calculator final-grade-calculator
Calculate the final exam score needed to reach a target course grade.
1cr · v2026-04-22
](/tools/final-grade-calculator/)
Electronics
[
LED Resistor Calculator led-resistor-calculator
Calculate LED current-limiting resistor values and power ratings.
1cr · v2026-04-22
](/tools/led-resistor-calculator/) [
PCB Trace Width Calculator pcb-trace-width-calculator
Estimate PCB trace width using the IPC-2221 current capacity formula.
1cr · v2026-04-22
](/tools/pcb-trace-width-calculator/)
Exponents
[
Exponents Calculator exponents-calculator
Raise a base to any power: exact decimal arithmetic for integer exponents up to ±500.
1cr · v2026-04-22
](/tools/exponents-calculator/) [
Half Life Calculator half-life-calculator
Solve exponential decay for remaining amount, initial amount, elapsed time, or half-life.
1cr · v2026-04-22
](/tools/half-life-calculator/)
Finance
[
Payback Period Calculator payback-period-calculator
Calculate the payback period from an initial investment and annual cash flows.
1cr · v2026-04-22
](/tools/payback-period-calculator/)
Fractions
[
Comparing Fractions Calculator comparing-fractions-calculator
Compare two fractions or mixed numbers using a common denominator.
1cr · v2026-04-22
](/tools/comparing-fractions-calculator/) [
Decimal to Fraction Calculator decimal-to-fraction-calculator
Convert a decimal or parenthesized repeating decimal to a fraction.
1cr · v2026-04-22
](/tools/decimal-to-fraction-calculator/) [
Equivalent Fractions Calculator equivalent-fractions-calculator
Generate equivalent fractions or check whether two fractions are equivalent.
1cr · v2026-04-22
](/tools/equivalent-fractions-calculator/) [
Fraction Calculator fraction-calculator
Add, subtract, multiply, divide, compare, or simplify fractions.
1cr · v2026-04-22
](/tools/fraction-calculator/) [
Fraction Simplifier fraction-simplifier
Reduce a fraction to lowest terms and return GCF, mixed number, decimal, percentage, and equivalents.
1cr · v2026-04-22
](/tools/fraction-simplifier/) [
Fraction to Decimal Calculator fraction-to-decimal-calculator
Convert proper, improper, or mixed fractions to decimals and detect repeating decimal patterns.
1cr · v2026-04-22
](/tools/fraction-to-decimal-calculator/) [
Fraction to Mixed Number Converter fraction-to-mixed-number-converter
Convert an improper fraction to a simplified mixed number.
1cr · v2026-04-22
](/tools/fraction-to-mixed-number-converter/) [
Fraction to Percent Converter fraction-to-percent-converter
Convert proper, improper, or mixed fractions to percentages with configurable decimal places.
1cr · v2026-04-22
](/tools/fraction-to-percent-converter/) [
Mixed Number to Fraction Converter mixed-number-to-fraction-converter
Convert a mixed number to an improper fraction and simplified form.
1cr · v2026-04-22
](/tools/mixed-number-to-fraction-converter/) [
Multiple Fraction Calculator multiple-fraction-calculator
Apply one arithmetic operation across a list of fractions.
1cr · v2026-04-22
](/tools/multiple-fraction-calculator/) [
Number to Fraction Converter number-to-fraction-converter
Convert decimals, percentages, mixed numbers, and repeating decimals to fractions.
1cr · v2026-04-22
](/tools/number-to-fraction-converter/) [
Reduce Fractions Calculator reduce-fractions-calculator
Reduce a proper, improper, or mixed fraction to lowest terms.
1cr · v2026-04-22
](/tools/reduce-fractions-calculator/)
Functions
[
Ceiling and Floor Function Calculator ceiling-and-floor-function-calculator
Evaluate floor, ceiling, fractional part, and nearest integer of a value.
1cr · v2026-04-22
](/tools/ceiling-and-floor-function-calculator/) [
Function Composition Calculator function-composition-calculator
Evaluate f(x), g(x), f(g(x)), and g(f(x)) for arithmetic functions.
1cr · v2026-04-22
](/tools/function-composition-calculator/) [
Function Odd Even Neither Checker function-odd-even-neither-checker
Classify a function as odd, even, both, or neither over sample points.
1cr · v2026-04-22
](/tools/function-odd-even-neither-checker/) [
Hyperbolic Functions Calculator hyperbolic-functions-calculator
Calculate sinh, cosh, tanh and reciprocal hyperbolic functions.
1cr · v2026-04-22
](/tools/hyperbolic-functions-calculator/)
Games
[
DPS Calculator dps-calculator
Calculate raw, sustained, critical-hit, and headshot damage per second.
1cr · v2026-04-22
](/tools/dps-calculator/)
Geometry
[
3D Distance Calculator 3d-distance-calculator
Calculate 3D Euclidean distance, midpoint, direction cosines, and related distances.
1cr · v2026-04-22
](/tools/3d-distance-calculator/) [
Angle Bisector Calculator angle-bisector-calculator
Calculate triangle angle bisectors, angles, area, and inradius from side lengths.
1cr · v2026-04-22
](/tools/angle-bisector-calculator/) [
Arc Length Calculator arc-length-calculator
Solve arc length, radius, or central angle for a circle sector.
1cr · v2026-04-22
](/tools/arc-length-calculator/) [
Area of a Circle Calculator area-of-a-circle-calculator
Calculate circle radius, diameter, circumference, and area from one value.
1cr · v2026-04-22
](/tools/area-of-a-circle-calculator/) [
Area of a Parallelogram Calculator area-of-a-parallelogram-calculator
Find parallelogram area from base-height, sides-angle, or diagonals-angle inputs.
1cr · v2026-04-22
](/tools/area-of-a-parallelogram-calculator/) [
Area of a Sector Calculator area-of-a-sector-calculator
Calculate sector area, arc length, perimeter, chord, and segment area.
1cr · v2026-04-22
](/tools/area-of-a-sector-calculator/) [
Area of a Trapezoid Calculator area-of-a-trapezoid-calculator
Calculate trapezoid area from two parallel bases and height.
1cr · v2026-04-22
](/tools/area-of-a-trapezoid-calculator/) [
Area of an Ellipse Calculator area-of-an-ellipse-calculator
Calculate ellipse area, Ramanujan perimeter, foci, and eccentricity.
1cr · v2026-04-22
](/tools/area-of-an-ellipse-calculator/) [
Area of Equilateral Triangle Calculator area-of-equilateral-triangle-calculator
Calculate equilateral-triangle side, area, height, perimeter, and radii.
1cr · v2026-04-22
](/tools/area-of-equilateral-triangle-calculator/) [
Cartesian to Polar Coordinates Converter cartesian-to-polar-converter
Convert Cartesian x-y coordinates to polar radius and angle.
1cr · v2026-04-22
](/tools/cartesian-to-polar-converter/) [
Circle Calculator circle-calculator
Calculate circle radius, diameter, circumference, area, and optional arc/sector values.
1cr · v2026-04-22
](/tools/circle-calculator/) [
Circumscribed Circle Circumcircle Calculator circumscribed-circle-circumcircle-calculator
Calculate the circumcircle of a triangle from side lengths or coordinates.
1cr · v2026-04-22
](/tools/circumscribed-circle-circumcircle-calculator/) [
Cone Flat Pattern Template Generator cone-flat-pattern-template-generator
Calculate unrolled cone or frustum flat-pattern dimensions.
1cr · v2026-04-22
](/tools/cone-flat-pattern-template-generator/) [
Conic Section Identifier conic-section-identifier
Classify a general second-degree equation as a conic section.
1cr · v2026-04-22
](/tools/conic-section-identifier/) [
Coordinate Geometry Distance Calculator coordinate-geometry-distance-calculator
Calculate distance, midpoint, slope, and line equations between two points.
1cr · v2026-04-22
](/tools/coordinate-geometry-distance-calculator/) [
Cylinder Calculator cylinder-calculator
Calculate cylinder volume, base area, lateral area, and total surface area.
1cr · v2026-04-22
](/tools/cylinder-calculator/) [
Distance Between Two Points Calculator distance-between-two-points-calculator
Calculate 2D point distance, midpoint, slope, and line equation.
1cr · v2026-04-22
](/tools/distance-between-two-points-calculator/) [
Ellipse Circumference Calculator ellipse-circumference-calculator
Calculate ellipse circumference with several common approximations.
1cr · v2026-04-22
](/tools/ellipse-circumference-calculator/) [
Euler Characteristic Calculator euler-characteristic-calculator
Calculate Euler characteristic V - E + F and classify common surfaces.
1cr · v2026-04-22
](/tools/euler-characteristic-calculator/) [
Frustum Calculator frustum-calculator
Calculate volume and surface area for a conical frustum.
1cr · v2026-04-22
](/tools/frustum-calculator/) [
General Triangle Solver general-triangle-solver
Solve any triangle (SSS, SAS, ASA, AAS, or the ambiguous SSA case) for all sides, angles, and area.
1cr · v2026-04-22
](/tools/general-triangle-solver/) [
Golden Ratio Calculator golden-ratio-calculator
Calculate golden-ratio segments from total, larger, or smaller segment.
1cr · v2026-04-22
](/tools/golden-ratio-calculator/) [
Golden Rectangle Calculator golden-rectangle-calculator
Calculate golden rectangle dimensions, area, perimeter, and aspect ratio.
1cr · v2026-04-22
](/tools/golden-rectangle-calculator/) [
Golden Section Calculator golden-section-calculator
Find the golden-section points within an interval.
1cr · v2026-04-22
](/tools/golden-section-calculator/) [
Great Circle Distance Calculator great-circle-distance-calculator
Calculate great-circle distance, bearing, and midpoint between two coordinates.
1cr · v2026-04-22
](/tools/great-circle-distance-calculator/) [
Heron's Formula Calculator heron-s-formula-calculator
Calculate triangle area from three side lengths using Heron's formula.
1cr · v2026-04-22
](/tools/heron-s-formula-calculator/) [
Hypotenuse Calculator hypotenuse-calculator
Calculate the hypotenuse and basic right-triangle measures from two legs.
1cr · v2026-04-22
](/tools/hypotenuse-calculator/) [
Inscribed Circle (Incircle) Calculator inscribed-circle-incircle-calculator
Incircle radius (and incenter, from vertex coordinates) of a triangle from side lengths or points.
1cr · v2026-04-22
](/tools/inscribed-circle-incircle-calculator/) [
Midpoint Calculator midpoint-calculator
Find the midpoint, distance, slope, and angle between two points.
1cr · v2026-04-22
](/tools/midpoint-calculator/) [
Point to Plane Distance Calculator point-to-plane-distance-calculator
Calculate the distance from a 3D point to a plane Ax + By + Cz + D = 0.
1cr · v2026-04-22
](/tools/point-to-plane-distance-calculator/) [
Polygon Diagonals Calculator polygon-diagonals-calculator
Calculate the number of diagonals and angle facts for a polygon.
1cr · v2026-04-22
](/tools/polygon-diagonals-calculator/) [
Pythagorean Theorem Calculator pythagorean-theorem-calculator
Find a missing right-triangle side and calculate area, perimeter, and angles.
1cr · v2026-04-22
](/tools/pythagorean-theorem-calculator/) [
Rectangle Calculator rectangle-calculator
Calculate rectangle area, perimeter, diagonal, radii, and aspect ratio from two known values.
1cr · v2026-04-22
](/tools/rectangle-calculator/) [
Regular Polygon Calculator regular-polygon-calculator
Calculate regular polygon area, perimeter, apothem, circumradius, angles, and diagonal count.
1cr · v2026-04-22
](/tools/regular-polygon-calculator/) [
Right Triangle Calculator right-triangle-calculator
Solve a right triangle from two sides or one side and one acute angle.
1cr · v2026-04-22
](/tools/right-triangle-calculator/) [
Shoelace Formula Calculator shoelace-formula-calculator
Calculate polygon area from vertex coordinates using the shoelace formula.
1cr · v2026-04-22
](/tools/shoelace-formula-calculator/) [
Slope and Grade Calculator slope-and-grade-calculator
Convert rise and run into slope, grade percentage and angle.
1cr · v2026-04-22
](/tools/slope-and-grade-calculator/) [
Slope Calculator slope-calculator
Calculate slope, angle, intercepts, and line equation from two points.
1cr · v2026-04-22
](/tools/slope-calculator/) [
Sphere Calculator sphere-calculator
Calculate sphere radius, diameter, circumference, surface area, and volume.
1cr · v2026-04-22
](/tools/sphere-calculator/) [
Square Calculator square-calculator
Calculate square side length, area, perimeter, diagonal, inradius, and circumradius from one known value.
1cr · v2026-04-22
](/tools/square-calculator/) [
Triangle Area Calculator triangle-area-calculator
Calculate triangle area from base and height or Heron's formula.
1cr · v2026-04-22
](/tools/triangle-area-calculator/) [
Triangle Centroid Calculator triangle-centroid-calculator
Calculate a triangle centroid and related side, area, and median properties.
1cr · v2026-04-22
](/tools/triangle-centroid-calculator/)
Geometry Calculators
[
Surface Area of a Rectangular Prism Calculator surface-area-of-a-rectangular-prism-calculator
Calculate rectangular prism surface area, lateral area, volume, diagonal, and face areas.
1cr · v2026-04-22
](/tools/surface-area-of-a-rectangular-prism-calculator/) [
Tangent Line to Circle Calculator tangent-line-to-circle-calculator
Find tangent line equations and contact points from a point to a circle.
1cr · v2026-04-22
](/tools/tangent-line-to-circle-calculator/) [
Torus Calculator torus-calculator
Calculate torus volume, surface area, and key radii.
1cr · v2026-04-22
](/tools/torus-calculator/) [
Triangle Orthocenter Calculator triangle-orthocenter-calculator
Calculate a triangle orthocenter, altitude feet, side lengths, area, and classifications from coordinates.
1cr · v2026-04-22
](/tools/triangle-orthocenter-calculator/)
Graph Theory
[
Adjacency Matrix Calculator adjacency-matrix-calculator
Build an adjacency matrix from an edge list (or read one back), with degrees, density, connected components, symmetry, and walk counts from matrix powers.
1cr · v2026-04-22
](/tools/adjacency-matrix-calculator/) [
Dijkstra's Shortest Path Calculator dijkstra-s-shortest-path-calculator
Run Dijkstra's algorithm on a small weighted graph.
1cr · v2026-04-22
](/tools/dijkstra-s-shortest-path-calculator/) [
Graph Coloring Calculator graph-coloring-calculator
Colour an undirected graph with greedy, Welsh-Powell, DSATUR, or exact search, reporting colour classes, the chromatic number, bipartiteness, and bounds.
1cr · v2026-04-22
](/tools/graph-coloring-calculator/) [
Graph Degree Sequence Validator graph-degree-sequence-validator
Validate simple graph degree sequences with the Havel-Hakimi algorithm.
1cr · v2026-04-22
](/tools/graph-degree-sequence-validator/) [
Planar Graph Checker planar-graph-checker
Check graph edge bounds and direct K5/K3,3 obstructions, with components and degree data.
1cr · v2026-04-22
](/tools/planar-graph-checker/) [
Topological Sort Calculator topological-sort-calculator
Topologically order a directed graph with Kahn or DFS, detect cycles, and report layers, sources, sinks, longest path, and the number of valid orderings.
1cr · v2026-04-22
](/tools/topological-sort-calculator/)
Growth
[
Logarithmic Growth Calculator logarithmic-growth-calculator
Solve compound growth value, time-to-target, or rate using logarithms.
1cr · v2026-04-22
](/tools/logarithmic-growth-calculator/)
Home
[
Aquarium Substrate Calculator aquarium-substrate-calculator
Estimate aquarium substrate volume, weight, and bag counts.
1cr · v2026-04-22
](/tools/aquarium-substrate-calculator/)
Length
[
Feet and Inches to Cm Converter feet-and-inches-to-cm-converter
Convert feet and inches to total inches, centimeters, meters, and height comparison percentages.
1cr · v2026-04-22
](/tools/feet-and-inches-to-cm-converter/)
Length Converters
[
Inches to Millimeters Converter inches-to-mm-converter
Convert decimal, fractional, or mixed-number inches to millimeters.
1cr · v2026-04-22
](/tools/inches-to-mm-converter/)
Lifestyle
[
Christmas Tree Calculator christmas-tree-calculator
Check tree height fit and estimate lights, ornaments, and garland.
1cr · v2026-04-22
](/tools/christmas-tree-calculator/)
Linear Algebra
[
Angle Between Vectors Calculator angle-between-vectors-calculator
Calculate the angle between two 2D or 3D vectors.
1cr · v2026-04-22
](/tools/angle-between-vectors-calculator/) [
Characteristic Polynomial Calculator characteristic-polynomial-calculator
Calculate characteristic polynomial coefficients for a square matrix.
1cr · v2026-04-22
](/tools/characteristic-polynomial-calculator/) [
Cholesky Decomposition Calculator cholesky-decomposition-calculator
Decompose a symmetric positive-definite matrix into A = L L^T.
1cr · v2026-04-22
](/tools/cholesky-decomposition-calculator/) [
Column Space Calculator column-space-calculator
Find matrix pivot columns, rank, nullity, RREF, and a column-space basis.
1cr · v2026-04-22
](/tools/column-space-calculator/) [
Cramer's Rule Calculator cramer-s-rule-calculator
Solve 2x2 or 3x3 linear systems with Cramer's rule.
1cr · v2026-04-22
](/tools/cramer-s-rule-calculator/) [
Cross Product Calculator cross-product-calculator
Calculate the 3D cross product, magnitude, areas, and angle.
1cr · v2026-04-22
](/tools/cross-product-calculator/) [
Determinant Calculator determinant-calculator
Calculate the determinant, trace, rank, and invertibility of a square matrix.
1cr · v2026-04-22
](/tools/determinant-calculator/) [
Dot Product Calculator dot-product-calculator
Calculate the dot product, magnitudes, angle, and vector projection.
1cr · v2026-04-22
](/tools/dot-product-calculator/) [
Eigenvalue and Eigenvector Calculator eigenvalue-eigenvector-calculator
Eigenvalues and eigenvectors of 2x2 and 3x3 matrices, exact when rational, complex included.
1cr · v2026-04-22
](/tools/eigenvalue-eigenvector-calculator/) [
Gram-Schmidt Calculator gram-schmidt-calculator
Orthogonalize 2-10 vectors (dimension 2-10): exact orthogonal basis plus orthonormal vectors.
1cr · v2026-04-22
](/tools/gram-schmidt-calculator/) [
Jordan Normal Form Calculator jordan-normal-form-calculator
Jordan normal form of a matrix with rational eigenvalues, with block sizes from the nullities of (A-lambda I)^k.
1cr · v2026-04-22
](/tools/jordan-normal-form-calculator/) [
Matrix Diagonalization Calculator matrix-diagonalization-calculator
Diagonalise a 2x2 to 4x4 matrix as A = P·D·P-inverse in exact rational arithmetic, reporting defective matrices.
1cr · v2026-04-22
](/tools/matrix-diagonalization-calculator/) [
Matrix Exponential Calculator matrix-exponential-calculator
Compute e^(At) by scaling and squaring with a Taylor series, checked against det(e^At) = e^(trace(A)t).
1cr · v2026-04-22
](/tools/matrix-exponential-calculator/) [
Matrix Inverse Calculator matrix-inverse-calculator
Invert a square matrix (2x2 to 8x8) by exact Gauss-Jordan elimination, with determinant.
1cr · v2026-04-22
](/tools/matrix-inverse-calculator/) [
Matrix LU Decomposition Calculator matrix-lu-decomposition-calculator
Factor a square matrix (2x2 to 8x8) into PA = LU with partial pivoting, exactly.
1cr · v2026-04-22
](/tools/matrix-lu-decomposition-calculator/) [
Matrix Multiplication Calculator matrix-multiplication-calculator
Multiply two matrices (up to 10x10) with exact fraction arithmetic.
1cr · v2026-04-22
](/tools/matrix-multiplication-calculator/) [
Matrix Power Calculator matrix-power-calculator
Raise a square matrix (up to 6x6) to any integer power from -10 to 20, exactly.
1cr · v2026-04-22
](/tools/matrix-power-calculator/) [
Matrix Rank Calculator matrix-rank-calculator
Rank, nullity, pivot and free columns of a matrix (up to 10x10) via exact row reduction.
1cr · v2026-04-22
](/tools/matrix-rank-calculator/) [
Matrix Trace Calculator matrix-trace-calculator
Calculate the trace and diagonal details of a square matrix.
1cr · v2026-04-22
](/tools/matrix-trace-calculator/) [
Null Space Calculator null-space-calculator
Kernel basis vectors of a matrix (up to 8x8) via exact RREF, with verification.
1cr · v2026-04-22
](/tools/null-space-calculator/) [
RREF Calculator (Row Echelon Form) rref-calculator-row-echelon-form
Reduced row echelon form (up to 10x10) with rank, pivots, and augmented-system analysis.
1cr · v2026-04-22
](/tools/rref-calculator-row-echelon-form/) [
Unit Vector Calculator unit-vector-calculator
Normalize a vector and return its unit vector.
1cr · v2026-04-22
](/tools/unit-vector-calculator/) [
Vector Magnitude Calculator vector-magnitude-calculator
Calculate the Euclidean magnitude and unit vector for any vector.
1cr · v2026-04-22
](/tools/vector-magnitude-calculator/) [
Vector Projection Calculator vector-projection-calculator
Project one vector onto another and compute the orthogonal component.
1cr · v2026-04-22
](/tools/vector-projection-calculator/)
Logarithms
[
Log Base 10 Calculator log-base-10-calculator
Calculate common logarithms with bounds and an antilog check.
1cr · v2026-04-22
](/tools/log-base-10-calculator/) [
Log Base 2 Calculator log-base-2-calculator
Calculate binary logarithms and detect exact powers of two.
1cr · v2026-04-22
](/tools/log-base-2-calculator/) [
Log Calculator log-calculator
Logarithm of x in base 10, e, 2, or any custom base, with all three standard logs for comparison.
1cr · v2026-04-22
](/tools/log-calculator/) [
Natural Log Calculator natural-log-calculator
ln(x) with log10, log2, the derivative 1/x, and e^x, flagging exact powers of e.
1cr · v2026-04-22
](/tools/natural-log-calculator/)
Logic
[
Boolean Algebra Simplifier boolean-algebra-simplifier
Simplify a boolean expression to its minimal sum-of-products or product-of-sums form, with canonical forms, prime implicants, and literal savings.
1cr · v2026-04-22
](/tools/boolean-algebra-simplifier/) [
Karnaugh Map (K-Map) Solver karnaugh-map-k-map-solver
Minimise 2-5 variable boolean functions from minterms, maxterms, or a truth table with Quine-McCluskey, returning prime implicants and the Gray-coded K-map grid.
1cr · v2026-04-22
](/tools/karnaugh-map-k-map-solver/) [
Truth Table Generator truth-table-generator
Generate truth tables for small boolean logic expressions.
1cr · v2026-04-22
](/tools/truth-table-generator/)
Number Formatting
[
Rounding Calculator rounding-calculator
Round to decimal places, significant figures, or the nearest multiple with 6 rounding methods compared.
1cr · v2026-04-22
](/tools/rounding-calculator/) [
Significant Figures Calculator significant-figures-calculator
Count, round, and apply arithmetic rules for significant figures.
1cr · v2026-04-22
](/tools/significant-figures-calculator/)
Number Systems
[
Base Converter base-converter
Convert integers between bases 2 through 36.
1cr · v2026-04-22
](/tools/base-converter/) [
Base-N Calculator base-n-calculator
Convert an integer from any base 2 through 36 to every other base.
1cr · v2026-04-22
](/tools/base-n-calculator/) [
BCD to Binary Converter bcd-to-binary-converter
Convert 8421 BCD nibbles to decimal and binary.
1cr · v2026-04-22
](/tools/bcd-to-binary-converter/) [
BCD to Decimal Converter bcd-to-decimal-converter
Convert binary-coded decimal nibbles to a decimal integer.
1cr · v2026-04-22
](/tools/bcd-to-decimal-converter/) [
BCD to Hex Converter bcd-to-hex-converter
Convert BCD to hexadecimal or hexadecimal to BCD.
1cr · v2026-04-22
](/tools/bcd-to-hex-converter/) [
Binary Calculator binary-calculator
Run binary arithmetic and bitwise operations.
1cr · v2026-04-22
](/tools/binary-calculator/) [
Binary Converter binary-converter
Convert a binary number to decimal, hexadecimal, octal, or any base from 2 to 36.
1cr · v2026-04-22
](/tools/binary-converter/) [
Binary to BCD Converter binary-to-bcd-converter
Convert an integer binary value to binary-coded decimal.
1cr · v2026-04-22
](/tools/binary-to-bcd-converter/) [
Binary to Decimal Converter binary-to-decimal-converter
Convert a binary number to decimal, hexadecimal, and octal.
1cr · v2026-04-22
](/tools/binary-to-decimal-converter/) [
Binary to Gray Code Converter binary-to-gray-code-converter
Convert an integer binary value to Gray code.
1cr · v2026-04-22
](/tools/binary-to-gray-code-converter/) [
Binary to Hex Converter binary-to-hex-converter
Convert a binary number to hexadecimal with nibble grouping.
1cr · v2026-04-22
](/tools/binary-to-hex-converter/) [
Binary to Octal Converter binary-to-octal-converter
Convert a binary number to octal using 3-bit grouping.
1cr · v2026-04-22
](/tools/binary-to-octal-converter/) [
Decimal to BCD Converter decimal-to-bcd-converter
Convert a decimal integer to Binary-Coded Decimal (4 bits per digit), with a plain-binary comparison.
1cr · v2026-04-22
](/tools/decimal-to-bcd-converter/) [
Decimal to Binary Converter decimal-to-binary-converter
Convert a decimal integer to binary with grouped bits and division steps.
1cr · v2026-04-22
](/tools/decimal-to-binary-converter/) [
Decimal to Hex Converter decimal-to-hex-converter
Convert a decimal integer to hexadecimal with conversion steps.
1cr · v2026-04-22
](/tools/decimal-to-hex-converter/) [
Decimal to Octal Converter decimal-to-octal-converter
Convert a base-10 integer to octal with division steps.
1cr · v2026-04-22
](/tools/decimal-to-octal-converter/) [
Decimal to Scientific Notation Converter decimal-to-scientific-notation-converter
Convert decimal numbers to scientific, E, and engineering notation.
1cr · v2026-04-22
](/tools/decimal-to-scientific-notation-converter/) [
Gray Code to Binary Converter gray-code-to-binary-converter
Convert Gray code to ordinary binary with XOR steps.
1cr · v2026-04-22
](/tools/gray-code-to-binary-converter/) [
Hex Converter hex-converter
Convert integers between hexadecimal, decimal, binary, and octal.
1cr · v2026-04-22
](/tools/hex-converter/) [
Hex to BCD Converter hex-to-bcd-converter
Convert a hexadecimal integer to binary-coded decimal.
1cr · v2026-04-22
](/tools/hex-to-bcd-converter/) [
Hex to Binary Converter hex-to-binary-converter
Convert a hexadecimal integer to binary.
1cr · v2026-04-22
](/tools/hex-to-binary-converter/) [
Hex to Decimal Converter hex-to-decimal-converter
Convert a hexadecimal integer to decimal with digit breakdown.
1cr · v2026-04-22
](/tools/hex-to-decimal-converter/) [
Hex to Octal Converter hex-to-octal-converter
Convert a hexadecimal integer to octal through binary grouping.
1cr · v2026-04-22
](/tools/hex-to-octal-converter/) [
Octal Converter octal-converter
Convert non-negative integers between octal, decimal, binary, and hex.
1cr · v2026-04-22
](/tools/octal-converter/) [
Octal to Binary Converter octal-to-binary-converter
Convert an octal integer to binary with per-digit mapping.
1cr · v2026-04-22
](/tools/octal-to-binary-converter/) [
Octal to Decimal Converter octal-to-decimal-converter
Convert an octal integer to decimal with positional breakdown.
1cr · v2026-04-22
](/tools/octal-to-decimal-converter/) [
Ratio to Percentage Calculator ratio-to-percentage-calculator
Convert ratios, fractions, or decimal divisions to percentages.
1cr · v2026-04-22
](/tools/ratio-to-percentage-calculator/) [
Roman Numerals Converter roman-numerals-converter
Convert between Roman numerals and Arabic numbers (1-3999) with canonical-form checking.
1cr · v2026-04-22
](/tools/roman-numerals-converter/) [
Scientific Notation to Decimal Converter scientific-notation-to-decimal-converter
Convert scientific notation to ordinary decimal notation.
1cr · v2026-04-22
](/tools/scientific-notation-to-decimal-converter/)
Number Theory
[
Amicable Number Checker amicable-number-checker
Check whether two integers form an amicable pair, or find the partner of a single number.
1cr · v2026-04-22
](/tools/amicable-number-checker/) [
Chinese Remainder Theorem Calculator chinese-remainder-theorem-calculator
Solve a system of simultaneous congruences with pairwise coprime moduli using the CRT.
1cr · v2026-04-22
](/tools/chinese-remainder-theorem-calculator/) [
Continued Fraction Calculator continued-fraction-calculator
Expand a decimal, fraction, or square root into a continued fraction with convergents.
1cr · v2026-04-22
](/tools/continued-fraction-calculator/) [
Digital Root Calculator digital-root-calculator
Repeated digit sum or product to a single digit in base 2, 8, 10, or 16, with persistence and the casting-out-nines formula check.
1cr · v2026-04-22
](/tools/digital-root-calculator/) [
Divisibility Test Calculator divisibility-test-calculator
Test a number against common divisors, primes, or custom divisors with rule explanations.
1cr · v2026-04-22
](/tools/divisibility-test-calculator/) [
Egyptian Fraction Calculator egyptian-fraction-calculator
Express a proper fraction as a sum of distinct unit fractions using the greedy Fibonacci-Sylvester algorithm.
1cr · v2026-04-22
](/tools/egyptian-fraction-calculator/) [
Euler's Totient Function Calculator euler-s-totient-function-calculator
Calculate Euler's totient function phi(n) with its prime factorization.
1cr · v2026-04-22
](/tools/euler-s-totient-function-calculator/) [
Extended Euclidean Algorithm Calculator extended-euclidean-algorithm-calculator
Find the GCD of two integers and Bezout coefficients via the extended Euclidean algorithm.
1cr · v2026-04-22
](/tools/extended-euclidean-algorithm-calculator/) [
Factor Calculator factor-calculator
List all factors and factor pairs of a number up to 10^12 with its prime factorization.
1cr · v2026-04-22
](/tools/factor-calculator/) [
Factorial Calculator factorial-calculator
Calculate factorial metadata, exact values for bounded inputs, and scientific notation.
1cr · v2026-04-22
](/tools/factorial-calculator/) [
Fibonacci Number Checker fibonacci-number-checker
Check whether a non-negative integer is in the Fibonacci sequence.
1cr · v2026-04-22
](/tools/fibonacci-number-checker/) [
First n Prime Numbers first-n-prime-numbers
Generate the first n primes (up to 10,000) with twin-prime pairs and gap statistics.
1cr · v2026-04-22
](/tools/first-n-prime-numbers/) [
Goldbach Conjecture Verifier goldbach-conjecture-verifier
Verify an even integer by finding prime pairs that sum to it.
1cr · v2026-04-22
](/tools/goldbach-conjecture-verifier/) [
Greatest Common Factor Calculator greatest-common-factor-calculator
Find the GCF of up to 15 numbers with prime factorizations and all common factors.
1cr · v2026-04-22
](/tools/greatest-common-factor-calculator/) [
Prime Number Checker is-it-a-prime-number
Check whether a number up to 10^15 is prime, with factorization and the 5 nearest primes either side.
1cr · v2026-04-22
](/tools/is-it-a-prime-number/) [
Least Common Multiple Calculator least-common-multiple-calculator
Find the LCM of up to 15 numbers with prime factorizations and the GCF cross-check.
1cr · v2026-04-22
](/tools/least-common-multiple-calculator/) [
List of Prime Numbers list-of-prime-numbers
List every prime from 2 up to a limit (max 10,000) with density and twin-prime statistics.
1cr · v2026-04-22
](/tools/list-of-prime-numbers/) [
Mersenne Prime Checker mersenne-prime-checker
Check whether 2^p - 1 is prime for bounded exponents.
1cr · v2026-04-22
](/tools/mersenne-prime-checker/) [
Möbius Function Calculator mobius-function-calculator
Evaluate the Möbius function μ(n) from the prime factorization of n.
1cr · v2026-04-22
](/tools/mobius-function-calculator/) [
Modular Exponentiation Calculator modular-exponentiation-calculator
Compute base^exponent mod modulus efficiently with binary square-and-multiply statistics.
1cr · v2026-04-22
](/tools/modular-exponentiation-calculator/) [
Partition Function Calculator partition-function-calculator
Calculate the integer partition number p(n) for bounded n.
1cr · v2026-04-22
](/tools/partition-function-calculator/) [
Perfect Number Checker perfect-number-checker
Classify a positive integer as perfect, abundant, or deficient.
1cr · v2026-04-22
](/tools/perfect-number-checker/) [
Prime Factor Calculator prime-factor-calculator
Prime factors plus divisor sum, Euler's totient, and abundant/deficient/perfect classification.
1cr · v2026-04-22
](/tools/prime-factor-calculator/) [
Prime Factorization Calculator prime-factorization-calculator
Factor a number up to 10^15 into primes with exponent form and divisor count.
1cr · v2026-04-22
](/tools/prime-factorization-calculator/) [
Primitive Root Calculator primitive-root-calculator
Test whether primitive roots exist modulo n and list them with φ(n).
1cr · v2026-04-22
](/tools/primitive-root-calculator/) [
Twin Prime Finder twin-prime-finder
Find twin prime pairs up to a bounded integer limit.
1cr · v2026-04-22
](/tools/twin-prime-finder/)
Numbers
[
Scientific Notation Calculator scientific-notation-calculator
Convert a number into scientific, E and engineering notation.
1cr · v2026-04-22
](/tools/scientific-notation-calculator/)
Numerology
[
Destiny Number Calculator destiny-number-calculator
Calculate a Pythagorean numerology destiny number from a name.
1cr · v2026-04-22
](/tools/destiny-number-calculator/)
Payroll
[
Overtime Pay Calculator overtime-pay-calculator
Calculate regular pay, overtime pay, gross pay, and effective hourly rate.
1cr · v2026-04-22
](/tools/overtime-pay-calculator/)
Percentage
[
Decimal to Percent Converter decimal-to-percent-converter
Convert one or more decimal numbers to percentages.
1cr · v2026-04-22
](/tools/decimal-to-percent-converter/) [
Percent to Decimal Converter percent-to-decimal-converter
Convert one or many percentages to decimals (divide by 100), batch input supported.
1cr · v2026-04-22
](/tools/percent-to-decimal-converter/) [
Percentage Calculator percentage-calculator
Six percentage operations behind one endpoint, selected by mode.
1cr · v2026-04-22
](/tools/percentage-calculator/) [
Percentage Change Calculator percentage-change-calculator
Calculate percentage change between two values with chart-ready before-and-after data.
1cr · v2026-04-22
](/tools/percentage-change-calculator/) [
Percentage Decrease Calculator percentage-decrease-calculator
Find a percentage decrease, apply one to a value, or recover the original value before a decrease.
1cr · v2026-04-22
](/tools/percentage-decrease-calculator/) [
Percentage Error Calculator percentage-error-calculator
Calculate percent error between estimated and actual values.
1cr · v2026-04-22
](/tools/percentage-error-calculator/) [
Percentage Increase Calculator percentage-increase-calculator
Calculate the absolute and percentage increase or decrease between two positive values.
1cr · v2026-04-22
](/tools/percentage-increase-calculator/)
Percentages
[
Percent Growth Rate Calculator percent-growth-rate-calculator
Calculate total percent change, simple annual growth, CAGR, and multiplier.
1cr · v2026-04-22
](/tools/percent-growth-rate-calculator/)
Physics
[
Acceleration Calculator acceleration-calculator
Calculate acceleration from velocity change, distance, force, centripetal motion, or free fall.
1cr · v2026-04-22
](/tools/acceleration-calculator/) [
Boxing Punch Power Calculator boxing-punch-power-calculator
Estimate punch force, kinetic energy, and power from speed and effective mass.
1cr · v2026-04-22
](/tools/boxing-punch-power-calculator/) [
Headlight Beam Distance Calculator headlight-beam-distance-calculator
Calculate headlight beam road reach from mounting height and aim angle.
1cr · v2026-04-22
](/tools/headlight-beam-distance-calculator/) [
Horsepower Calculator horsepower-calculator
Solve horsepower, torque, or RPM and return common power conversions.
1cr · v2026-04-22
](/tools/horsepower-calculator/) [
Penny Drop Impact Calculator penny-drop-impact-calculator
Estimate idealized penny impact velocity, energy, momentum, and force.
1cr · v2026-04-22
](/tools/penny-drop-impact-calculator/) [
Speed Calculator speed-calculator
Calculate speed from distance and time with common speed unit conversions.
1cr · v2026-04-22
](/tools/speed-calculator/)
Planning
[
Parking Ratio Calculator parking-ratio-calculator
Estimate parking spaces from common land-use parking ratios.
1cr · v2026-04-22
](/tools/parking-ratio-calculator/)
Probability
[
Bayes' Theorem Calculator bayes-theorem-calculator
Calculate the posterior probability with Bayes' theorem, likelihood ratio, and natural frequencies.
1cr · v2026-04-22
](/tools/bayes-theorem-calculator/) [
Beta Distribution Calculator beta-distribution-calculator
Beta distribution density, cumulative probability, quantiles, and shape statistics.
1cr · v2026-04-22
](/tools/beta-distribution-calculator/) [
Binomial Probability Distribution Calculator binomial-probability-distribution-calculator
Calculate exact and cumulative binomial probabilities.
1cr · v2026-04-22
](/tools/binomial-probability-distribution-calculator/) [
Dice Roll Probability Calculator dice-roll-probability-calculator
Calculate exact probability metrics for sums of identical dice.
1cr · v2026-04-22
](/tools/dice-roll-probability-calculator/) [
Exponential Distribution Calculator exponential-distribution-calculator
Exponential distribution probabilities (P(X<=x), P(X>x), between) plus mean, median, and variance.
1cr · v2026-04-22
](/tools/exponential-distribution-calculator/) [
Gacha Pity Calculator gacha-pity-calculator
Estimate pull success probability with soft and hard pity rates.
1cr · v2026-04-22
](/tools/gacha-pity-calculator/) [
Geometric Distribution Calculator geometric-distribution-calculator
Compute PMF, CDF, survival, mean, and variance for a geometric distribution.
1cr · v2026-04-22
](/tools/geometric-distribution-calculator/) [
Hypergeometric Distribution Calculator hypergeometric-distribution-calculator
Calculate exact and cumulative hypergeometric probabilities.
1cr · v2026-04-22
](/tools/hypergeometric-distribution-calculator/) [
Loot Drop Probability Calculator loot-drop-probability-calculator
Calculate loot drop odds across repeated independent attempts.
1cr · v2026-04-22
](/tools/loot-drop-probability-calculator/) [
Negative Binomial Distribution Calculator negative-binomial-distribution-calculator
Negative binomial PMF and cumulative probabilities in failures or total-trials parametrization.
1cr · v2026-04-22
](/tools/negative-binomial-distribution-calculator/) [
Normal Distribution Calculator normal-distribution-calculator
Normal probabilities: left/right tail, between two values, or inverse lookup, with z-scores and PDF.
1cr · v2026-04-22
](/tools/normal-distribution-calculator/) [
Poisson Distribution Calculator poisson-distribution-calculator
Calculate Poisson PMF, CDF, and tail probabilities.
1cr · v2026-04-22
](/tools/poisson-distribution-calculator/) [
Probability Calculator probability-calculator
Compute basic, conditional, Bayes, and complement probabilities.
1cr · v2026-04-22
](/tools/probability-calculator/)
Ratios
[
Aspect Ratio Calculator aspect-ratio-calculator
Simplify dimensions to a ratio, derive dimensions from a ratio, or resize proportionally.
1cr · v2026-04-22
](/tools/aspect-ratio-calculator/) [
Proportion Calculator proportion-calculator
Solve or verify a proportion a/b = c/d from three or four values.
1cr · v2026-04-22
](/tools/proportion-calculator/) [
Ratio Calculator ratio-calculator
Solve a:b = c:d proportions, simplify or scale ratios, and generate equivalent ratio tables.
1cr · v2026-04-22
](/tools/ratio-calculator/) [
Unit Rate Calculator unit-rate-calculator
Calculate a unit rate or compare two unit rates.
1cr · v2026-04-22
](/tools/unit-rate-calculator/)
Sequence Tools
[
Catalan Number Generator catalan-number-generator
Calculate the nth Catalan number and nearby sequence values.
1cr · v2026-04-22
](/tools/catalan-number-generator/) [
Collatz Conjecture Calculator collatz-conjecture-calculator
Generate and analyze the deterministic Collatz hailstone sequence.
1cr · v2026-04-22
](/tools/collatz-conjecture-calculator/)
Sequences
[
Arithmetic Sequence Calculator arithmetic-sequence-calculator
Calculate the nth term and partial sum of an arithmetic sequence.
1cr · v2026-04-22
](/tools/arithmetic-sequence-calculator/) [
Cube Numbers List cube-numbers-list
List cube numbers n³ for bases up to 1000 with sums and prime-base counts.
1cr · v2026-04-22
](/tools/cube-numbers-list/) [
Geometric Sequence Calculator geometric-sequence-calculator
Calculate nth term, partial sum, and sample terms for a geometric sequence.
1cr · v2026-04-22
](/tools/geometric-sequence-calculator/) [
Happy Number Calculator happy-number-calculator
Check whether a number is happy or list happy numbers up to a limit.
1cr · v2026-04-22
](/tools/happy-number-calculator/) [
List of Fibonacci Numbers list-of-fibonacci-numbers
Generate Fibonacci numbers by count, maximum value, or index range.
1cr · v2026-04-22
](/tools/list-of-fibonacci-numbers/) [
Number Pattern Finder number-pattern-finder
Detect arithmetic, geometric or quadratic patterns and predict the next value.
1cr · v2026-04-22
](/tools/number-pattern-finder/) [
Pascal's Triangle Generator pascal-s-triangle-generator
Generate Pascal's triangle rows and related row sums.
1cr · v2026-04-22
](/tools/pascal-s-triangle-generator/) [
Sequence Calculator sequence-calculator
Generate arithmetic, geometric, or Fibonacci-style sequence terms and sums.
1cr · v2026-04-22
](/tools/sequence-calculator/) [
Skip Counting Generator skip-counting-generator
Generate an arithmetic skip-counting sequence.
1cr · v2026-04-22
](/tools/skip-counting-generator/) [
Square Numbers List square-numbers-list
List square numbers, find squares in a range, or check a perfect square.
1cr · v2026-04-22
](/tools/square-numbers-list/) [
Sum of Cubes Calculator sum-of-cubes-calculator
Calculate 1^3 + 2^3 +... + n^3.
1cr · v2026-04-22
](/tools/sum-of-cubes-calculator/) [
Sum of Positive Integers Calculator sum-of-positive-integers-calculator
Sum consecutive integers n1..n2 exactly with Gauss's pairing formula.
1cr · v2026-04-22
](/tools/sum-of-positive-integers-calculator/) [
Sum of Squares Calculator sum-of-squares-calculator
Calculate 1^2 + 2^2 +... + n^2.
1cr · v2026-04-22
](/tools/sum-of-squares-calculator/)
Set Theory
[
Inclusion Exclusion Calculator inclusion-exclusion-calculator
Apply inclusion-exclusion for one, two, or three finite sets.
1cr · v2026-04-22
](/tools/inclusion-exclusion-calculator/) [
Set Theory Calculator set-theory-calculator
Perform common finite set operations.
1cr · v2026-04-22
](/tools/set-theory-calculator/)
Special Functions
[
Beta Function Calculator beta-function-calculator
Calculate the Euler beta function B(x, y) via the gamma function relationship.
1cr · v2026-04-22
](/tools/beta-function-calculator/) [
Exponential Integral Calculator exponential-integral-calculator
Evaluate E1(x), Ei(x), the generalised E_n(x) and the logarithmic integral li(x).
1cr · v2026-04-22
](/tools/exponential-integral-calculator/)
Sports
[
Bike Gear Ratio Calculator bike-gear-ratio-calculator
Calculate bicycle gear ratio, gear inches, rollout, gain ratio, and speed.
1cr · v2026-04-22
](/tools/bike-gear-ratio-calculator/) [
Bowling Score Calculator bowling-score-calculator
Score a ten-pin bowling game from roll values.
1cr · v2026-04-22
](/tools/bowling-score-calculator/) [
Cricket Run Rate Calculator cricket-run-rate-calculator
Calculate current, projected, and required cricket run rates from cricket over notation.
1cr · v2026-04-22
](/tools/cricket-run-rate-calculator/) [
Usage Rate Calculator usage-rate-calculator
Calculate basketball usage rate from player and team shot, free throw, turnover, and minute stats.
1cr · v2026-04-22
](/tools/usage-rate-calculator/)
Statistics
[
A/B Test Sample Size Calculator a-b-test-sample-size-calculator
Size an A/B test from baseline rate, minimum detectable effect, significance, and power.
1cr · v2026-04-22
](/tools/a-b-test-sample-size-calculator/) [
A/B Test Significance Calculator a-b-test-significance-calculator
Test whether an A/B conversion-rate difference is significant, with lift, z score, p-value, and intervals.
1cr · v2026-04-22
](/tools/a-b-test-significance-calculator/) [
ANOVA Calculator anova-calculator
Run one-way ANOVA with F statistic, p-value, table components, and effect sizes.
1cr · v2026-04-22
](/tools/anova-calculator/) [
Arithmetic Mean Calculator arithmetic-mean-calculator
Calculate arithmetic mean, median, modes, range, variance, and standard deviation from a number list.
1cr · v2026-04-22
](/tools/arithmetic-mean-calculator/) [
Average Calculator average-calculator
Calculate mean, median, mode, range, variance, and optional weighted average.
1cr · v2026-04-22
](/tools/average-calculator/) [
Average Deviation Calculator average-deviation-calculator
Calculate mean and median absolute deviation for a numeric dataset.
1cr · v2026-04-22
](/tools/average-deviation-calculator/) [
Box and Whisker Plot Maker box-and-whisker-plot-maker
Compute box plot statistics, whiskers, fences, and outliers.
1cr · v2026-04-22
](/tools/box-and-whisker-plot-maker/) [
Central Limit Theorem Calculator central-limit-theorem-calculator
Sampling-distribution probabilities for the sample mean via the CLT (standard error, z-scores).
1cr · v2026-04-22
](/tools/central-limit-theorem-calculator/) [
Chi Square Test Calculator chi-square-test-calculator
Run a chi-square goodness-of-fit test for observed and expected counts.
1cr · v2026-04-22
](/tools/chi-square-test-calculator/) [
Coefficient of Variation Calculator coefficient-of-variation-calculator
Calculate coefficient of variation from sample or population standard deviation.
1cr · v2026-04-22
](/tools/coefficient-of-variation-calculator/) [
Cohen's d Calculator cohens-d-calculator
Calculate Cohen's d, Hedges' g, overlap, and effect-size interpretation.
1cr · v2026-04-22
](/tools/cohens-d-calculator/) [
Confidence Interval Calculator confidence-interval-calculator
Confidence interval for a population mean from raw data or summary statistics, using the t-distribution or the normal distribution.
1cr · v2026-04-22
](/tools/confidence-interval-calculator/) [
Confidence Interval for Proportion Calculator confidence-interval-for-proportion-calculator
Wald and Wilson score confidence intervals for a proportion at eight confidence levels.
1cr · v2026-04-22
](/tools/confidence-interval-for-proportion-calculator/) [
Contingency Table Calculator contingency-table-calculator
Chi-square test of independence for an r x c contingency table with expected counts, standardized residuals, cell contributions, and Cramer's V.
1cr · v2026-04-22
](/tools/contingency-table-calculator/) [
Correlation Coefficient Calculator correlation-coefficient-calculator
Calculate Pearson, Spearman, and Kendall correlation coefficients.
1cr · v2026-04-22
](/tools/correlation-coefficient-calculator/) [
Effect Size Calculator effect-size-calculator
Calculate Cohen's d, Hedges' g, Glass's delta, and related effect-size statistics for two groups.
1cr · v2026-04-22
](/tools/effect-size-calculator/) [
Entropy Calculator entropy-calculator
Calculate Shannon entropy of a probability distribution in bits, nats, or dits.
1cr · v2026-04-22
](/tools/entropy-calculator/) [
F-Test / F-Distribution Calculator f-test-f-distribution-calculator
Compare two variances with an F test, or turn an F statistic into a p-value and critical values.
1cr · v2026-04-22
](/tools/f-test-f-distribution-calculator/) [
Find Minimum and Maximum find-minimum-maximum
Find min, max, range, mean, median, positions, and sorted values for a number list.
1cr · v2026-04-22
](/tools/find-minimum-maximum/) [
Fisher's Exact Test Calculator fisher-s-exact-test-calculator
Exact hypergeometric test for a 2x2 table with one- and two-tailed p-values, odds ratio with confidence interval, relative risk, and expected counts.
1cr · v2026-04-22
](/tools/fisher-s-exact-test-calculator/) [
Five Number Summary Calculator five-number-summary-calculator
Calculate minimum, Q1, median, Q3, maximum, IQR, and outlier fences.
1cr · v2026-04-22
](/tools/five-number-summary-calculator/) [
Geometric Mean Calculator geometric-mean-calculator
Calculate geometric mean and compare it with arithmetic, harmonic, median, minimum, and maximum values.
1cr · v2026-04-22
](/tools/geometric-mean-calculator/) [
Gini Coefficient Calculator gini-coefficient-calculator
Calculate a Gini coefficient and Lorenz curve points from nonnegative data.
1cr · v2026-04-22
](/tools/gini-coefficient-calculator/) [
Harmonic Mean Calculator harmonic-mean-calculator
Calculate harmonic mean for positive non-zero values with comparison means and reciprocal totals.
1cr · v2026-04-22
](/tools/harmonic-mean-calculator/) [
Histogram Maker histogram-maker
Create histogram bin counts and relative frequencies from numeric data.
1cr · v2026-04-22
](/tools/histogram-maker/) [
Interquartile Range Calculator interquartile-range-calculator
Calculate IQR, quartiles, and 1.5-IQR outlier fences.
1cr · v2026-04-22
](/tools/interquartile-range-calculator/) [
Kruskal-Wallis Test Calculator kruskal-wallis-test-calculator
Run the Kruskal-Wallis H test for several independent groups, with tie correction and rank summaries.
1cr · v2026-04-22
](/tools/kruskal-wallis-test-calculator/) [
Linear Regression Calculator linear-regression-calculator
Least-squares line with r, R-squared, standard errors, sums of squares, and optional prediction.
1cr · v2026-04-22
](/tools/linear-regression-calculator/) [
Mean Absolute Deviation Calculator mean-absolute-deviation-calculator
Calculate mean or median absolute deviation for a numeric dataset.
1cr · v2026-04-22
](/tools/mean-absolute-deviation-calculator/) [
Mean Calculator mean-calculator
Calculate arithmetic mean and supporting summary statistics.
1cr · v2026-04-22
](/tools/mean-calculator/) [
Mean Median Mode Calculator mean-median-mode-calculator
Calculate mean, median, mode, range, variance, and standard deviation.
1cr · v2026-04-22
](/tools/mean-median-mode-calculator/) [
Median Absolute Deviation Calculator median-absolute-deviation-calculator
Calculate raw and scaled median absolute deviation as a robust spread measure.
1cr · v2026-04-22
](/tools/median-absolute-deviation-calculator/) [
Median Calculator median-calculator
Calculate the median, sorted data, quartiles, and range.
1cr · v2026-04-22
](/tools/median-calculator/) [
Midrange Calculator midrange-calculator
Calculate the midpoint between the minimum and maximum of a dataset.
1cr · v2026-04-22
](/tools/midrange-calculator/) [
Mode Calculator mode-calculator
Find the mode or modes and frequency table for a numeric dataset.
1cr · v2026-04-22
](/tools/mode-calculator/) [
Odds Ratio Calculator odds-ratio-calculator
Odds ratio with Woolf CI, relative risk, NNT, and Yates-corrected chi-square from a 2x2 table.
1cr · v2026-04-22
](/tools/odds-ratio-calculator/) [
Outlier Calculator outlier-calculator
Detect IQR outliers and return quartiles, bounds, and counts.
1cr · v2026-04-22
](/tools/outlier-calculator/) [
P-Value Calculator p-value-calculator
Convert a z, t, chi-square, or F test statistic into a one- or two-tailed p-value with critical values and significance at common alpha levels.
1cr · v2026-04-22
](/tools/p-value-calculator/) [
Percentile Calculator percentile-calculator
Calculate a percentile value or percentile rank for a numeric dataset.
1cr · v2026-04-22
](/tools/percentile-calculator/) [
Population Variance Calculator population-variance-calculator
Calculate population variance and population standard deviation.
1cr · v2026-04-22
](/tools/population-variance-calculator/) [
Quartile Calculator quartile-calculator
Calculate Q1, Q2, Q3, IQR, and outlier fences using a selected quartile method.
1cr · v2026-04-22
](/tools/quartile-calculator/) [
Quartile Deviation Calculator quartile-deviation-calculator
Calculate quartile deviation, IQR fences, and outliers for numeric data.
1cr · v2026-04-22
](/tools/quartile-deviation-calculator/) [
Range Calculator range-calculator
Range (max − min) of a data set with quartiles, IQR, midrange, and a spread rating.
1cr · v2026-04-22
](/tools/range-calculator/) [
Relative Risk Calculator relative-risk-calculator
Relative risk with confidence interval, attributable fractions, NNT, and significance test.
1cr · v2026-04-22
](/tools/relative-risk-calculator/) [
Relative Standard Deviation Calculator relative-standard-deviation-calculator
Calculate RSD, coefficient of variation, and precision quality for data.
1cr · v2026-04-22
](/tools/relative-standard-deviation-calculator/) [
Root Mean Square Calculator root-mean-square-calculator
Calculate root mean square for a numeric list.
1cr · v2026-04-22
](/tools/root-mean-square-calculator/) [
Sample Mean Calculator sample-mean-calculator
Calculate sample mean plus core descriptive statistics for a numeric dataset.
1cr · v2026-04-22
](/tools/sample-mean-calculator/) [
Sample Size Calculator sample-size-calculator
Survey sample size from confidence level, margin of error, and optional finite-population correction.
1cr · v2026-04-22
](/tools/sample-size-calculator/) [
Sample Standard Deviation Calculator sample-standard-deviation-calculator
Calculate sample standard deviation and optional z-score outliers.
1cr · v2026-04-22
](/tools/sample-standard-deviation-calculator/) [
Sample Variance Calculator sample-variance-calculator
Calculate sample or population variance from a numeric dataset.
1cr · v2026-04-22
](/tools/sample-variance-calculator/) [
Spearman Rank Correlation Calculator spearman-rank-correlation-calculator
Spearman's rho with average-rank tie handling, tie correction, and t-based significance.
1cr · v2026-04-22
](/tools/spearman-rank-correlation-calculator/) [
Standard Deviation Calculator standard-deviation-calculator
Calculate sample and population standard deviation with quartiles.
1cr · v2026-04-22
](/tools/standard-deviation-calculator/) [
Standard Error Calculator standard-error-calculator
Calculate standard error of the mean and a z-based confidence interval.
1cr · v2026-04-22
](/tools/standard-error-calculator/) [
Statistics Calculator statistics-calculator
Calculate descriptive statistics and histogram-ready distribution data from numeric values.
1cr · v2026-04-22
](/tools/statistics-calculator/) [
t-Test Calculator t-test-calculator
Run one-sample, paired, or independent two-sample t-tests with Welch or pooled variance, p-value, critical value, confidence interval, and Cohen's d.
1cr · v2026-04-22
](/tools/t-test-calculator/) [
Variance Calculator variance-calculator
Calculate sample and population variance with related statistics.
1cr · v2026-04-22
](/tools/variance-calculator/) [
Weibull Distribution Calculator weibull-distribution-calculator
Calculate Weibull PDF/CDF/reliability, moments, and B-life values.
1cr · v2026-04-22
](/tools/weibull-distribution-calculator/) [
Weighted Average Calculator weighted-average-calculator
Calculate a weighted average from value and weight lists.
1cr · v2026-04-22
](/tools/weighted-average-calculator/) [
Z-Score Calculator zscore-calculator
Calculate z-scores, inverse values, percentiles, and normal probabilities.
1cr · v2026-04-22
](/tools/zscore-calculator/)
Surface Area
[
Surface Area of a Cone Calculator surface-area-of-a-cone-calculator
Calculate cone base, lateral, and total surface area from radius-height, radius-slant, or diameter-height inputs.
1cr · v2026-04-22
](/tools/surface-area-of-a-cone-calculator/) [
Surface Area of a Cube Calculator surface-area-of-a-cube-calculator
Calculate cube surface area and related measurements from edge, diagonal, volume, or surface area.
1cr · v2026-04-22
](/tools/surface-area-of-a-cube-calculator/)
Time
[
Commute Life Wasted Calculator commute-life-wasted-calculator
Estimate weekly, yearly, and career time spent commuting.
1cr · v2026-04-22
](/tools/commute-life-wasted-calculator/)
Trigonometry
[
Arccos Calculator arccos-calculator
Calculate inverse cosine in radians and degrees.
1cr · v2026-04-22
](/tools/arccos-calculator/) [
Arcsin Calculator arcsin-calculator
Calculate arcsine from a sine value, including degree/radian output and special-angle recognition.
1cr · v2026-04-22
](/tools/arcsin-calculator/) [
Arctan Calculator arctan-calculator
Calculate inverse tangent in radians and degrees.
1cr · v2026-04-22
](/tools/arctan-calculator/) [
Arctan2 Calculator arctan2-calculator
Calculate atan2(y, x), normalized angle, radius, slope, and quadrant.
1cr · v2026-04-22
](/tools/arctan2-calculator/) [
Cosine Calculator cosine-calculator
Calculate cosine with radians/degrees conversion, quadrant, and special-angle recognition.
1cr · v2026-04-22
](/tools/cosine-calculator/) [
Cosecant/Secant/Cotangent Calculator csc-sec-cot-calculator
Calculate csc, sec, cot, sine, and cosine for an angle.
1cr · v2026-04-22
](/tools/csc-sec-cot-calculator/) [
Decimal Degrees to DMS Converter decimal-degrees-to-dms-converter
Convert decimal degrees to degrees, minutes, and seconds, with hemisphere labels for coordinates.
1cr · v2026-04-22
](/tools/decimal-degrees-to-dms-converter/) [
Degree to Radian Converter degree-to-radian-converter
Convert degrees to radians with pi-fraction, quadrant, and trig values.
1cr · v2026-04-22
](/tools/degree-to-radian-converter/) [
DMS to Decimal Degrees Converter dms-to-decimal-converter
Convert degrees, minutes, and seconds to signed decimal degrees.
1cr · v2026-04-22
](/tools/dms-to-decimal-converter/) [
Law of Cosines Calculator law-of-cosines-calculator
Use the law of cosines to solve a side or included angle.
1cr · v2026-04-22
](/tools/law-of-cosines-calculator/) [
Law of Sines Calculator law-of-sines-calculator
Use the law of sines to solve a side or possible angle.
1cr · v2026-04-22
](/tools/law-of-sines-calculator/) [
Sine Calculator sine-calculator
Calculate sine with radians/degrees conversion, quadrant, and special-angle recognition.
1cr · v2026-04-22
](/tools/sine-calculator/) [
Tangent Calculator tangent-calculator
Calculate tangent and flag vertical-asymptote inputs.
1cr · v2026-04-22
](/tools/tangent-calculator/) [
Unit Circle Calculator unit-circle-calculator
Calculate unit-circle sine, cosine, tangent, radians, degrees, and point coordinates.
1cr · v2026-04-22
](/tools/unit-circle-calculator/)
Unit Conversion
[
Length Converter length-converter
Convert a length value across metric, imperial, and nautical units.
1cr · v2026-04-22
](/tools/length-converter/)
Unit Converters
[
Acres to Hectares Converter acres-to-hectares-converter
Convert between acres and hectares with related area units.
1cr · v2026-04-22
](/tools/acres-to-hectares-converter/) [
Acres to Perches Converter acres-to-perches-converter
Convert acres and perches for land area calculations.
1cr · v2026-04-22
](/tools/acres-to-perches-converter/) [
Acres to Square Feet Converter acres-to-square-feet-converter
Convert between acres and square feet with related area units.
1cr · v2026-04-22
](/tools/acres-to-square-feet-converter/) [
Acres to Square Meters Converter acres-to-square-meters-converter
Convert between acres and square meters with related area units.
1cr · v2026-04-22
](/tools/acres-to-square-meters-converter/) [
Acres to Square Miles Converter acres-to-square-miles-converter
Convert acres and square miles, including related land-area units.
1cr · v2026-04-22
](/tools/acres-to-square-miles-converter/) [
Acres to Square Yards Converter acres-to-square-yards-converter
Convert acres and square yards, including related area units.
1cr · v2026-04-22
](/tools/acres-to-square-yards-converter/) [
Angle Converter angle-converter
Convert angles between degrees, radians, gradians, turns, arcminutes, arcseconds, and milliradians.
1cr · v2026-04-22
](/tools/angle-converter/) [
CM to Inches Converter cm-to-inches-converter
Convert centimeters to inches, feet/inches, and nearest 1/16-inch fraction.
1cr · v2026-04-22
](/tools/cm-to-inches-converter/) [
Cups to Tablespoons Converter cups-to-tablespoons-converter
Convert US cups and tablespoons, including teaspoons and fluid ounces.
1cr · v2026-04-22
](/tools/cups-to-tablespoons-converter/) [
Data Transfer Rate Converter data-transfer-rate-converter
Convert bandwidth between bps, Mbps, MB/s and binary variants, with an optional download-time estimate.
1cr · v2026-04-22
](/tools/data-transfer-rate-converter/) [
Feet to Meters Converter feet-to-meters-converter
Convert feet and optional inches to meters, centimeters, and millimeters.
1cr · v2026-04-22
](/tools/feet-to-meters-converter/) [
File Size Converter file-size-converter
Convert file sizes across decimal (KB, MB) and binary (KiB, MiB) units with an all-unit table.
1cr · v2026-04-22
](/tools/file-size-converter/) [
Gallons to Cups Converter gallons-to-cups-converter
Convert US gallons and cups, with quart and pint equivalents.
1cr · v2026-04-22
](/tools/gallons-to-cups-converter/) [
Grams to Ounces Converter grams-to-ounces-converter
Convert grams to ounces, pounds, kilograms, and milligrams.
1cr · v2026-04-22
](/tools/grams-to-ounces-converter/) [
Grams to Pounds Converter grams-to-pounds-converter
Convert grams to pounds, ounces, and kilograms.
1cr · v2026-04-22
](/tools/grams-to-pounds-converter/) [
Inches to CM Converter inches-to-cm-converter
Convert inches to centimeters, millimeters, meters, and feet.
1cr · v2026-04-22
](/tools/inches-to-cm-converter/) [
kg to lbs Converter kg-to-lbs-converter
Convert kilograms and pounds with ounce breakdown.
1cr · v2026-04-22
](/tools/kg-to-lbs-converter/) [
kPa to psi Converter kpa-to-psi-converter
Convert kilopascals to psi, bar, atm, and mmHg.
1cr · v2026-04-22
](/tools/kpa-to-psi-converter/) [
Liters to Cups Converter liters-to-cups-converter
Convert liters to US, metric, and imperial cups.
1cr · v2026-04-22
](/tools/liters-to-cups-converter/) [
mAh to Wh Converter mah-to-wh-converter
Convert battery capacity and energy among mAh, Ah and Wh using nominal voltage.
1cr · v2026-04-22
](/tools/mah-to-wh-converter/) [
Meters to Feet Converter meters-to-feet-converter
Convert meters to decimal feet and feet-and-inches.
1cr · v2026-04-22
](/tools/meters-to-feet-converter/) [
Ounce to Gram Converter ounce-to-gram-converter
Convert ounces to grams, kilograms, milligrams, and pounds.
1cr · v2026-04-22
](/tools/ounce-to-gram-converter/) [
Ounces to Cups Converter ounces-to-cups-converter
Convert US fluid ounces and cups with spoon and milliliter equivalents.
1cr · v2026-04-22
](/tools/ounces-to-cups-converter/) [
Percent to PPM Converter percent-to-ppm-converter
Convert percent to ppm or ppm to percent.
1cr · v2026-04-22
](/tools/percent-to-ppm-converter/) [
Perches to Acres Converter perches-to-acres-converter
Convert perches and acres for land area calculations.
1cr · v2026-04-22
](/tools/perches-to-acres-converter/) [
Pounds to Grams Converter pounds-to-grams-converter
Convert pounds to grams, kilograms, ounces, and milligrams.
1cr · v2026-04-22
](/tools/pounds-to-grams-converter/) [
PPM to Percent Converter ppm-to-percent-converter
Convert parts per million to percentage and related concentration scales.
1cr · v2026-04-22
](/tools/ppm-to-percent-converter/) [
Square Yards to Acres Converter square-yards-to-acres-converter
Convert square yards and acres, including related area units.
1cr · v2026-04-22
](/tools/square-yards-to-acres-converter/) [
Tablespoons to Cups Converter tablespoons-to-cups-converter
Convert US tablespoons to cups, teaspoons, fluid ounces, and milliliters.
1cr · v2026-04-22
](/tools/tablespoons-to-cups-converter/) [
Tablespoons to Teaspoons Converter tablespoons-to-teaspoons-converter
Convert US tablespoons to teaspoons, cups, fluid ounces, and milliliters.
1cr · v2026-04-22
](/tools/tablespoons-to-teaspoons-converter/) [
Teaspoons to Cups Converter teaspoons-to-cups-converter
Convert US teaspoons and cups, including tablespoons and fluid ounces.
1cr · v2026-04-22
](/tools/teaspoons-to-cups-converter/) [
Teaspoons to Tablespoons Converter teaspoons-to-tablespoons-converter
Convert US teaspoons to tablespoons, cups, fluid ounces, and milliliters.
1cr · v2026-04-22
](/tools/teaspoons-to-tablespoons-converter/)
Volume
[
Cups to Gallons Converter cups-to-gallons-converter
Convert US cups and gallons with related volume units.
1cr · v2026-04-22
](/tools/cups-to-gallons-converter/) [
Cups to Liters Converter cups-to-liters-converter
Convert US cups and liters with milliliter, fluid-ounce, and spoon equivalents.
1cr · v2026-04-22
](/tools/cups-to-liters-converter/) [
Cups to Ounces Converter cups-to-ounces-converter
Convert cups and fluid ounces for US customary, US legal, imperial, or metric cups.
1cr · v2026-04-22
](/tools/cups-to-ounces-converter/) [
Cups to Quarts Converter cups-to-quarts-converter
Convert US cups and quarts with related volume units.
1cr · v2026-04-22
](/tools/cups-to-quarts-converter/) [
Cups to Teaspoons Converter cups-to-teaspoons-converter
Convert US cups and teaspoons with tablespoon and fluid-ounce equivalents.
1cr · v2026-04-22
](/tools/cups-to-teaspoons-converter/) [
Volume of a Cone Calculator volume-of-a-cone-calculator
Calculate cone volume, slant height, base area, lateral area, and total surface area.
1cr · v2026-04-22
](/tools/volume-of-a-cone-calculator/) [
Volume of a Cube Calculator volume-of-a-cube-calculator
Calculate cube volume, surface area, face area, diagonals, and total edge length.
1cr · v2026-04-22
](/tools/volume-of-a-cube-calculator/) [
Volume of a Pyramid Calculator volume-of-a-pyramid-calculator
Calculate volume, base area, slant height, and surface area for square, rectangular, or triangular pyramids.
1cr · v2026-04-22
](/tools/volume-of-a-pyramid-calculator/) [
Volume of a Rectangular Prism Calculator volume-of-a-rectangular-prism-calculator
Calculate rectangular prism volume, surface area, diagonals, base perimeter, and total edge length.
1cr · v2026-04-22
](/tools/volume-of-a-rectangular-prism-calculator/) [
Volume of Ellipsoid Calculator volume-of-ellipsoid-calculator
Calculate ellipsoid volume, approximate surface area, cross sections, equivalent sphere radius, and shape type.
1cr · v2026-04-22
](/tools/volume-of-ellipsoid-calculator/)
Volume Converters
[
Cubic Meters to Cubic Feet cubic-meters-to-cubic-feet
Convert cubic meters and cubic feet with common volume equivalents.
1cr · v2026-04-22
](/tools/cubic-meters-to-cubic-feet/) [
Gallons to Liters Converter gallons-to-liters-converter
Convert US or UK gallons to liters, with a reverse conversion mode.
1cr · v2026-04-22
](/tools/gallons-to-liters-converter/)
API OPERATIONAL v1 · OpenAPI 3.1 · MCP 2025-06-18
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