Math API — 402 endpoints

Advanced

Advanced Math

Antilog Calculatorantilog-calculator

Calculate an antilogarithm as base raised to an exponent.

1cr · v2026-04-22

Error Function Calculatorerror-function-calculator

Evaluate erf, erfc, inverse erf, and inverse erfc for bounded inputs.

1cr · v2026-04-22

Gamma Function Calculatorgamma-function-calculator

Evaluate the gamma function for bounded real inputs.

1cr · v2026-04-22

Algebra

Absolute Value Equation Solverabsolute-value-equation-solver

Solve equations of the form |a*x + b| = c.

1cr · v2026-04-22

Absolute Value Inequality Solverabsolute-value-inequality-solver

Solve inequalities of the form |a*x + b| compared with c.

1cr · v2026-04-22

Binomial Theorem Expansion Calculatorbinomial-theorem-expansion-calculator

Expand (a + b)^n for n up to 50 with every coefficient and term listed.

1cr · v2026-04-22

Completing the Square Calculatorcompleting-the-square-calculator

Convert a quadratic to vertex form and solve by completing the square.

1cr · v2026-04-22

Cubic Equation Solvercubic-equation-solver

Solve ax^3 + bx^2 + cx + d = 0 and return all real or complex roots.

1cr · v2026-04-22

Descartes' Rule of Signs Calculatordescartes-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

Distance-Speed-Time Triangle Calculatordistance-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

Expand Polynomials Calculatorexpand-polynomials-calculator

Expand a product of polynomial factors (optionally raised to a power) into standard form with exact rational coefficients.

1cr · v2026-04-22

Linear Equation Solverlinear-equation-solver

Solve a linear equation in the form ax + b = c.

1cr · v2026-04-22

Parabola Calculatorparabola-calculator

Analyze a quadratic parabola from coefficients a, b, and c.

1cr · v2026-04-22

Partial Fraction Decomposition Calculatorpartial-fraction-decomposition-calculator

Decompose a rational expression into partial fractions.

1cr · v2026-04-22

Point Slope Form Calculatorpoint-slope-form-calculator

Build point-slope, slope-intercept, and standard-form line equations.

1cr · v2026-04-22

Polynomial Factoring Calculatorpolynomial-factoring-calculator

Factor a polynomial over the rationals: content, rational roots with multiplicity, linear factors, and any irreducible remainder.

1cr · v2026-04-22

Polynomial Long Division Calculatorpolynomial-long-division-calculator

Divide one polynomial by another with exact rational arithmetic, returning quotient, remainder, and step-by-step subtraction.

1cr · v2026-04-22

Polynomial Roots Calculatorpolynomial-roots-calculator

Real and complex roots of a polynomial (degree up to 12) via exact formulas or Durand-Kerner iteration.

1cr · v2026-04-22

Quadratic Formula Calculatorquadratic-formula-calculator

Solve quadratic roots with discriminant and vertex details.

1cr · v2026-04-22

Slope Intercept Form Calculatorslope-intercept-form-calculator

Build slope-intercept and standard-form line equations from m and b.

1cr · v2026-04-22

Square Root Calculatorsquare-root-calculator

Calculate the principal and negative square roots of a non-negative number.

1cr · v2026-04-22

Standard Form to Slope Intercept Converterstandard-form-to-slope-intercept-converter

Convert Ax + By = C into slope-intercept form when possible.

1cr · v2026-04-22

Synthetic Division Calculatorsynthetic-division-calculator

Divide polynomial coefficients by x minus a using synthetic division.

1cr · v2026-04-22

System of Linear Equations Solversystem-of-linear-equations-solver

Solve n x n linear systems (2 to 8 unknowns) exactly, including parametric infinite-solution forms.

1cr · v2026-04-22

X and Y Intercept Calculatorx-y-intercept-calculator

Find x- and y-intercepts for a linear equation ax + by + c = 0.

1cr · v2026-04-22

Algebra Calculators

Vertex and Axis of Symmetry Calculatorvertex-axis-calculator

Find the vertex and axis of symmetry for a quadratic ax^2 + bx + c.

1cr · v2026-04-22

Analytic Geometry

Parallel and Perpendicular Line Calculatorparallel-and-perpendicular-line-calculator

Find parallel and perpendicular lines through a given point.

1cr · v2026-04-22

Angles

Radian to Degree Converterradian-to-degree-converter

Convert radians, fractions, or pi expressions to degrees.

1cr · v2026-04-22

Area

Acreage Calculatoracreage-calculator

Calculate land acreage from rectangle, triangle, or circle dimensions.

1cr · v2026-04-22

Hectares to Acres Converterhectares-to-acres-converter

Convert hectares to acres and related land-area units.

1cr · v2026-04-22

Square Feet to Acres Convertersquare-feet-to-acres-converter

Convert square feet to acres and related land-area units.

1cr · v2026-04-22

Square Footage Calculatorsquare-footage-calculator

Calculate square footage for common room, lot, and curved shapes.

1cr · v2026-04-22

Square Meters to Acres Convertersquare-meters-to-acres-converter

Convert square meters to acres and related land-area units.

1cr · v2026-04-22

Square Miles to Acres Convertersquare-miles-to-acres-converter

Convert square miles to acres and related land-area units.

1cr · v2026-04-22

Arithmetic

Long Addition and Subtraction Calculatorlong-addition-and-subtraction-calculator

Add or subtract large integers and return aligned column output.

1cr · v2026-04-22

Order of Operations Calculator PEMDASorder-of-operations-calculator-pemdas

Evaluate arithmetic expressions using standard PEMDAS precedence.

1cr · v2026-04-22

Audio

BPM to Millisecond Delay Calculatorbpm-to-ms-delay-calculator

Convert tempo in BPM into synchronized straight, dotted, and triplet delay times.

1cr · v2026-04-22

Basic Math

Absolute Value Calculatorabsolute-value-calculator

Calculate the absolute value of a real or complex number.

1cr · v2026-04-22

Cube and Cube Root Calculatorcube-and-cube-root-calculator

Calculate a number's cube and cube root.

1cr · v2026-04-22

Cube Root Calculatorcube-root-calculator

Calculate the real cube root of a finite number.

1cr · v2026-04-22

Even or Odd Number Checkereven-or-odd-number-checker

Check whether one or more integers are even or odd.

1cr · v2026-04-22

First n Digits of efirst-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

First n Digits of Pifirst-n-digits-of-pi

First n digits of pi (Chudnovsky series, exact via Decimal) with digit-frequency analysis.

1cr · v2026-04-22

Long Division Calculatorlong-division-calculator

Calculate quotient, remainder, decimal expansion, and long division steps.

1cr · v2026-04-22

Long Multiplication Calculatorlong-multiplication-calculator

Calculate a product with long multiplication partial products.

1cr · v2026-04-22

Nth Root Calculatornth-root-calculator

High-precision nth roots (up to 100 decimals) with exact-root detection and verification.

1cr · v2026-04-22

Number of Digitsnumber-of-digits

Count the digits of any integer with digit frequency, palindrome check, and scientific notation.

1cr · v2026-04-22

Quotient and Remainder Calculatorquotient-and-remainder-calculator

Compute the integer quotient and remainder of a division with verification.

1cr · v2026-04-22

Sum Calculatorsum-calculator

High-precision decimal sum of up to 5000 numbers with average, median, and sign statistics.

1cr · v2026-04-22

Calculus

Average Rate of Change Calculatoraverage-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

Curvature Calculatorcurvature-calculator

Calculate curvature and radius of curvature for a quadratic function.

1cr · v2026-04-22

Infinite Series Sum Calculatorinfinite-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

Maclaurin Series Calculatormaclaurin-series-calculator

Exact-coefficient Maclaurin (Taylor at 0) series expansion for common functions, with optional evaluation.

1cr · v2026-04-22

Partial Derivative Calculatorpartial-derivative-calculator

Differentiate a symbolic expression with respect to x, y, z, or t.

1cr · v2026-04-22

Series Convergence Test Calculatorseries-convergence-test-calculator

Convergence verdict (absolute/conditional/divergent) for common series families with ratio, root, and divergence test estimates.

1cr · v2026-04-22

Taylor Series Calculatortaylor-series-calculator

Taylor series expansion of common functions about any center a, using exact shifted-derivative formulas, with optional evaluation.

1cr · v2026-04-22

Charts

Bar Graph Makerbar-graph-maker

Prepare normalized bar-chart data from labels and numeric values.

1cr · v2026-04-22

Combinatorics

Binomial Coefficient Calculatorbinomial-coefficient-calculator

Calculate C(n, k), the number of combinations choosing k items from n.

1cr · v2026-04-22

Combination Calculatorcombination-calculator

Calculate combinations C(n, k).

1cr · v2026-04-22

Derangement (Subfactorial) Calculatorderangement-subfactorial-calculator

Calculate the number of derangements (subfactorial !n) for n elements.

1cr · v2026-04-22

Permutation Calculatorpermutation-calculator

Calculate P(n,r), where order matters and repetition is not allowed.

1cr · v2026-04-22

Permutations with Repetition Calculatorpermutations-with-repetition-calculator

Calculate n^r ordered arrangements where items can repeat.

1cr · v2026-04-22

Stirling Numbers Calculatorstirling-numbers-calculator

Calculate unsigned Stirling numbers of the first kind and Stirling numbers of the second kind.

1cr · v2026-04-22

Complex Numbers

Complex Numbers Calculatorcomplex-numbers-calculator

Add, subtract, multiply, or divide two complex numbers.

1cr · v2026-04-22

Conics

Hyperbola Calculatorhyperbola-calculator

Calculate standard-form hyperbola vertices, foci, eccentricity, and asymptotes.

1cr · v2026-04-22

Construction

Flooring Calculatorflooring-calculator

Estimate flooring material units, waste allowance, and optional cost.

1cr · v2026-04-22

Insulation Calculatorinsulation-calculator

Estimate insulation R-value target, thickness, material quantity, and cost range.

1cr · v2026-04-22

Paver Calculatorpaver-calculator

Estimate paving stones needed for a rectangular project area.

1cr · v2026-04-22

Cooking

Butter to Oil Converterbutter-to-oil-converter

Convert butter quantities to practical oil equivalents for baking.

1cr · v2026-04-22

Coordinate Geometry

Polar to Cartesian Converterpolar-to-cartesian-converter

Convert polar coordinates to Cartesian x and y coordinates.

1cr · v2026-04-22

Education

Final Grade Calculatorfinal-grade-calculator

Calculate the final exam score needed to reach a target course grade.

1cr · v2026-04-22

Electronics

LED Resistor Calculatorled-resistor-calculator

Calculate LED current-limiting resistor values and power ratings.

1cr · v2026-04-22

PCB Trace Width Calculatorpcb-trace-width-calculator

Estimate PCB trace width using the IPC-2221 current capacity formula.

1cr · v2026-04-22

Exponents

Exponents Calculatorexponents-calculator

Raise a base to any power: exact decimal arithmetic for integer exponents up to ±500.

1cr · v2026-04-22

Half Life Calculatorhalf-life-calculator

Solve exponential decay for remaining amount, initial amount, elapsed time, or half-life.

1cr · v2026-04-22

Finance

Payback Period Calculatorpayback-period-calculator

Calculate the payback period from an initial investment and annual cash flows.

1cr · v2026-04-22

Fractions

Comparing Fractions Calculatorcomparing-fractions-calculator

Compare two fractions or mixed numbers using a common denominator.

1cr · v2026-04-22

Decimal to Fraction Calculatordecimal-to-fraction-calculator

Convert a decimal or parenthesized repeating decimal to a fraction.

1cr · v2026-04-22

Equivalent Fractions Calculatorequivalent-fractions-calculator

Generate equivalent fractions or check whether two fractions are equivalent.

1cr · v2026-04-22

Fraction Calculatorfraction-calculator

Add, subtract, multiply, divide, compare, or simplify fractions.

1cr · v2026-04-22

Fraction Simplifierfraction-simplifier

Reduce a fraction to lowest terms and return GCF, mixed number, decimal, percentage, and equivalents.

1cr · v2026-04-22

Fraction to Decimal Calculatorfraction-to-decimal-calculator

Convert proper, improper, or mixed fractions to decimals and detect repeating decimal patterns.

1cr · v2026-04-22

Fraction to Mixed Number Converterfraction-to-mixed-number-converter

Convert an improper fraction to a simplified mixed number.

1cr · v2026-04-22

Fraction to Percent Converterfraction-to-percent-converter

Convert proper, improper, or mixed fractions to percentages with configurable decimal places.

1cr · v2026-04-22

Mixed Number to Fraction Convertermixed-number-to-fraction-converter

Convert a mixed number to an improper fraction and simplified form.

1cr · v2026-04-22

Multiple Fraction Calculatormultiple-fraction-calculator

Apply one arithmetic operation across a list of fractions.

1cr · v2026-04-22

Number to Fraction Converternumber-to-fraction-converter

Convert decimals, percentages, mixed numbers, and repeating decimals to fractions.

1cr · v2026-04-22

Reduce Fractions Calculatorreduce-fractions-calculator

Reduce a proper, improper, or mixed fraction to lowest terms.

1cr · v2026-04-22

Functions

Ceiling and Floor Function Calculatorceiling-and-floor-function-calculator

Evaluate floor, ceiling, fractional part, and nearest integer of a value.

1cr · v2026-04-22

Function Composition Calculatorfunction-composition-calculator

Evaluate f(x), g(x), f(g(x)), and g(f(x)) for arithmetic functions.

1cr · v2026-04-22

Function Odd Even Neither Checkerfunction-odd-even-neither-checker

Classify a function as odd, even, both, or neither over sample points.

1cr · v2026-04-22

Hyperbolic Functions Calculatorhyperbolic-functions-calculator

Calculate sinh, cosh, tanh and reciprocal hyperbolic functions.

1cr · v2026-04-22

Games

DPS Calculatordps-calculator

Calculate raw, sustained, critical-hit, and headshot damage per second.

1cr · v2026-04-22

Geometry

3D Distance Calculator3d-distance-calculator

Calculate 3D Euclidean distance, midpoint, direction cosines, and related distances.

1cr · v2026-04-22

Angle Bisector Calculatorangle-bisector-calculator

Calculate triangle angle bisectors, angles, area, and inradius from side lengths.

1cr · v2026-04-22

Arc Length Calculatorarc-length-calculator

Solve arc length, radius, or central angle for a circle sector.

1cr · v2026-04-22

Area of a Circle Calculatorarea-of-a-circle-calculator

Calculate circle radius, diameter, circumference, and area from one value.

1cr · v2026-04-22

Area of a Parallelogram Calculatorarea-of-a-parallelogram-calculator

Find parallelogram area from base-height, sides-angle, or diagonals-angle inputs.

1cr · v2026-04-22

Area of a Sector Calculatorarea-of-a-sector-calculator

Calculate sector area, arc length, perimeter, chord, and segment area.

1cr · v2026-04-22

Area of a Trapezoid Calculatorarea-of-a-trapezoid-calculator

Calculate trapezoid area from two parallel bases and height.

1cr · v2026-04-22

Area of an Ellipse Calculatorarea-of-an-ellipse-calculator

Calculate ellipse area, Ramanujan perimeter, foci, and eccentricity.

1cr · v2026-04-22

Area of Equilateral Triangle Calculatorarea-of-equilateral-triangle-calculator

Calculate equilateral-triangle side, area, height, perimeter, and radii.

1cr · v2026-04-22

Cartesian to Polar Coordinates Convertercartesian-to-polar-converter

Convert Cartesian x-y coordinates to polar radius and angle.

1cr · v2026-04-22

Circle Calculatorcircle-calculator

Calculate circle radius, diameter, circumference, area, and optional arc/sector values.

1cr · v2026-04-22

Circumscribed Circle Circumcircle Calculatorcircumscribed-circle-circumcircle-calculator

Calculate the circumcircle of a triangle from side lengths or coordinates.

1cr · v2026-04-22

Cone Flat Pattern Template Generatorcone-flat-pattern-template-generator

Calculate unrolled cone or frustum flat-pattern dimensions.

1cr · v2026-04-22

Conic Section Identifierconic-section-identifier

Classify a general second-degree equation as a conic section.

1cr · v2026-04-22

Coordinate Geometry Distance Calculatorcoordinate-geometry-distance-calculator

Calculate distance, midpoint, slope, and line equations between two points.

1cr · v2026-04-22

Cylinder Calculatorcylinder-calculator

Calculate cylinder volume, base area, lateral area, and total surface area.

1cr · v2026-04-22

Distance Between Two Points Calculatordistance-between-two-points-calculator

Calculate 2D point distance, midpoint, slope, and line equation.

1cr · v2026-04-22

Ellipse Circumference Calculatorellipse-circumference-calculator

Calculate ellipse circumference with several common approximations.

1cr · v2026-04-22

Euler Characteristic Calculatoreuler-characteristic-calculator

Calculate Euler characteristic V - E + F and classify common surfaces.

1cr · v2026-04-22

Frustum Calculatorfrustum-calculator

Calculate volume and surface area for a conical frustum.

1cr · v2026-04-22

General Triangle Solvergeneral-triangle-solver

Solve any triangle (SSS, SAS, ASA, AAS, or the ambiguous SSA case) for all sides, angles, and area.

1cr · v2026-04-22

Golden Ratio Calculatorgolden-ratio-calculator

Calculate golden-ratio segments from total, larger, or smaller segment.

1cr · v2026-04-22

Golden Rectangle Calculatorgolden-rectangle-calculator

Calculate golden rectangle dimensions, area, perimeter, and aspect ratio.

1cr · v2026-04-22

Golden Section Calculatorgolden-section-calculator

Find the golden-section points within an interval.

1cr · v2026-04-22

Great Circle Distance Calculatorgreat-circle-distance-calculator

Calculate great-circle distance, bearing, and midpoint between two coordinates.

1cr · v2026-04-22

Heron's Formula Calculatorheron-s-formula-calculator

Calculate triangle area from three side lengths using Heron's formula.

1cr · v2026-04-22

Hypotenuse Calculatorhypotenuse-calculator

Calculate the hypotenuse and basic right-triangle measures from two legs.

1cr · v2026-04-22

Inscribed Circle (Incircle) Calculatorinscribed-circle-incircle-calculator

Incircle radius (and incenter, from vertex coordinates) of a triangle from side lengths or points.

1cr · v2026-04-22

Midpoint Calculatormidpoint-calculator

Find the midpoint, distance, slope, and angle between two points.

1cr · v2026-04-22

Point to Plane Distance Calculatorpoint-to-plane-distance-calculator

Calculate the distance from a 3D point to a plane Ax + By + Cz + D = 0.

1cr · v2026-04-22

Polygon Diagonals Calculatorpolygon-diagonals-calculator

Calculate the number of diagonals and angle facts for a polygon.

1cr · v2026-04-22

Pythagorean Theorem Calculatorpythagorean-theorem-calculator

Find a missing right-triangle side and calculate area, perimeter, and angles.

1cr · v2026-04-22

Rectangle Calculatorrectangle-calculator

Calculate rectangle area, perimeter, diagonal, radii, and aspect ratio from two known values.

1cr · v2026-04-22

Regular Polygon Calculatorregular-polygon-calculator

Calculate regular polygon area, perimeter, apothem, circumradius, angles, and diagonal count.

1cr · v2026-04-22

Right Triangle Calculatorright-triangle-calculator

Solve a right triangle from two sides or one side and one acute angle.

1cr · v2026-04-22

Shoelace Formula Calculatorshoelace-formula-calculator

Calculate polygon area from vertex coordinates using the shoelace formula.

1cr · v2026-04-22

Slope Calculatorslope-calculator

Calculate slope, angle, intercepts, and line equation from two points.

1cr · v2026-04-22

Sphere Calculatorsphere-calculator

Calculate sphere radius, diameter, circumference, surface area, and volume.

1cr · v2026-04-22

Square Calculatorsquare-calculator

Calculate square side length, area, perimeter, diagonal, inradius, and circumradius from one known value.

1cr · v2026-04-22

Triangle Area Calculatortriangle-area-calculator

Calculate triangle area from base and height or Heron's formula.

1cr · v2026-04-22

Triangle Centroid Calculatortriangle-centroid-calculator

Calculate a triangle centroid and related side, area, and median properties.

1cr · v2026-04-22

Geometry Calculators

Surface Area of a Rectangular Prism Calculatorsurface-area-of-a-rectangular-prism-calculator

Calculate rectangular prism surface area, lateral area, volume, diagonal, and face areas.

1cr · v2026-04-22

Tangent Line to Circle Calculatortangent-line-to-circle-calculator

Find tangent line equations and contact points from a point to a circle.

1cr · v2026-04-22

Torus Calculatortorus-calculator

Calculate torus volume, surface area, and key radii.

1cr · v2026-04-22

Triangle Orthocenter Calculatortriangle-orthocenter-calculator

Calculate a triangle orthocenter, altitude feet, side lengths, area, and classifications from coordinates.

1cr · v2026-04-22

Graph Theory

Adjacency Matrix Calculatoradjacency-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

Dijkstra's Shortest Path Calculatordijkstra-s-shortest-path-calculator

Run Dijkstra's algorithm on a small weighted graph.

1cr · v2026-04-22

Graph Coloring Calculatorgraph-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

Graph Degree Sequence Validatorgraph-degree-sequence-validator

Validate simple graph degree sequences with the Havel-Hakimi algorithm.

1cr · v2026-04-22

Topological Sort Calculatortopological-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

Growth

Logarithmic Growth Calculatorlogarithmic-growth-calculator

Solve compound growth value, time-to-target, or rate using logarithms.

1cr · v2026-04-22

Home

Aquarium Substrate Calculatoraquarium-substrate-calculator

Estimate aquarium substrate volume, weight, and bag counts.

1cr · v2026-04-22

Length

Feet and Inches to Cm Converterfeet-and-inches-to-cm-converter

Convert feet and inches to total inches, centimeters, meters, and height comparison percentages.

1cr · v2026-04-22

Length Converters

Inches to Millimeters Converterinches-to-mm-converter

Convert decimal, fractional, or mixed-number inches to millimeters.

1cr · v2026-04-22

Lifestyle

Christmas Tree Calculatorchristmas-tree-calculator

Check tree height fit and estimate lights, ornaments, and garland.

1cr · v2026-04-22

Linear Algebra

Angle Between Vectors Calculatorangle-between-vectors-calculator

Calculate the angle between two 2D or 3D vectors.

1cr · v2026-04-22

Characteristic Polynomial Calculatorcharacteristic-polynomial-calculator

Calculate characteristic polynomial coefficients for a square matrix.

1cr · v2026-04-22

Cholesky Decomposition Calculatorcholesky-decomposition-calculator

Decompose a symmetric positive-definite matrix into A = L L^T.

1cr · v2026-04-22

Column Space Calculatorcolumn-space-calculator

Find matrix pivot columns, rank, nullity, RREF, and a column-space basis.

1cr · v2026-04-22

Cramer's Rule Calculatorcramer-s-rule-calculator

Solve 2x2 or 3x3 linear systems with Cramer's rule.

1cr · v2026-04-22

Cross Product Calculatorcross-product-calculator

Calculate the 3D cross product, magnitude, areas, and angle.

1cr · v2026-04-22

Determinant Calculatordeterminant-calculator

Calculate the determinant, trace, rank, and invertibility of a square matrix.

1cr · v2026-04-22

Dot Product Calculatordot-product-calculator

Calculate the dot product, magnitudes, angle, and vector projection.

1cr · v2026-04-22

Eigenvalue and Eigenvector Calculatoreigenvalue-eigenvector-calculator

Eigenvalues and eigenvectors of 2x2 and 3x3 matrices, exact when rational, complex included.

1cr · v2026-04-22

Gram-Schmidt Calculatorgram-schmidt-calculator

Orthogonalize 2-10 vectors (dimension 2-10): exact orthogonal basis plus orthonormal vectors.

1cr · v2026-04-22

Matrix Inverse Calculatormatrix-inverse-calculator

Invert a square matrix (2x2 to 8x8) by exact Gauss-Jordan elimination, with determinant.

1cr · v2026-04-22

Matrix LU Decomposition Calculatormatrix-lu-decomposition-calculator

Factor a square matrix (2x2 to 8x8) into PA = LU with partial pivoting, exactly.

1cr · v2026-04-22

Matrix Multiplication Calculatormatrix-multiplication-calculator

Multiply two matrices (up to 10x10) with exact fraction arithmetic.

1cr · v2026-04-22

Matrix Power Calculatormatrix-power-calculator

Raise a square matrix (up to 6x6) to any integer power from -10 to 20, exactly.

1cr · v2026-04-22

Matrix Rank Calculatormatrix-rank-calculator

Rank, nullity, pivot and free columns of a matrix (up to 10x10) via exact row reduction.

1cr · v2026-04-22

Matrix Trace Calculatormatrix-trace-calculator

Calculate the trace and diagonal details of a square matrix.

1cr · v2026-04-22

Null Space Calculatornull-space-calculator

Kernel basis vectors of a matrix (up to 8x8) via exact RREF, with verification.

1cr · v2026-04-22

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

Unit Vector Calculatorunit-vector-calculator

Normalize a vector and return its unit vector.

1cr · v2026-04-22

Vector Magnitude Calculatorvector-magnitude-calculator

Calculate the Euclidean magnitude and unit vector for any vector.

1cr · v2026-04-22

Vector Projection Calculatorvector-projection-calculator

Project one vector onto another and compute the orthogonal component.

1cr · v2026-04-22

Logarithms

Log Base 10 Calculatorlog-base-10-calculator

Calculate common logarithms with bounds and an antilog check.

1cr · v2026-04-22

Log Base 2 Calculatorlog-base-2-calculator

Calculate binary logarithms and detect exact powers of two.

1cr · v2026-04-22

Log Calculatorlog-calculator

Logarithm of x in base 10, e, 2, or any custom base, with all three standard logs for comparison.

1cr · v2026-04-22

Natural Log Calculatornatural-log-calculator

ln(x) with log10, log2, the derivative 1/x, and e^x, flagging exact powers of e.

1cr · v2026-04-22

Logic

Boolean Algebra Simplifierboolean-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

Karnaugh Map (K-Map) Solverkarnaugh-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

Truth Table Generatortruth-table-generator

Generate truth tables for small boolean logic expressions.

1cr · v2026-04-22

Number Formatting

Rounding Calculatorrounding-calculator

Round to decimal places, significant figures, or the nearest multiple with 6 rounding methods compared.

1cr · v2026-04-22

Significant Figures Calculatorsignificant-figures-calculator

Count, round, and apply arithmetic rules for significant figures.

1cr · v2026-04-22

Number Systems

Base Converterbase-converter

Convert integers between bases 2 through 36.

1cr · v2026-04-22

Base-N Calculatorbase-n-calculator

Convert an integer from any base 2 through 36 to every other base.

1cr · v2026-04-22

BCD to Binary Converterbcd-to-binary-converter

Convert 8421 BCD nibbles to decimal and binary.

1cr · v2026-04-22

BCD to Decimal Converterbcd-to-decimal-converter

Convert binary-coded decimal nibbles to a decimal integer.

1cr · v2026-04-22

BCD to Hex Converterbcd-to-hex-converter

Convert BCD to hexadecimal or hexadecimal to BCD.

1cr · v2026-04-22

Binary Calculatorbinary-calculator

Run binary arithmetic and bitwise operations.

1cr · v2026-04-22

Binary Converterbinary-converter

Convert a binary number to decimal, hexadecimal, octal, or any base from 2 to 36.

1cr · v2026-04-22

Binary to BCD Converterbinary-to-bcd-converter

Convert an integer binary value to binary-coded decimal.

1cr · v2026-04-22

Binary to Decimal Converterbinary-to-decimal-converter

Convert a binary number to decimal, hexadecimal, and octal.

1cr · v2026-04-22

Binary to Gray Code Converterbinary-to-gray-code-converter

Convert an integer binary value to Gray code.

1cr · v2026-04-22

Binary to Hex Converterbinary-to-hex-converter

Convert a binary number to hexadecimal with nibble grouping.

1cr · v2026-04-22

Binary to Octal Converterbinary-to-octal-converter

Convert a binary number to octal using 3-bit grouping.

1cr · v2026-04-22

Decimal to BCD Converterdecimal-to-bcd-converter

Convert a decimal integer to Binary-Coded Decimal (4 bits per digit), with a plain-binary comparison.

1cr · v2026-04-22

Decimal to Binary Converterdecimal-to-binary-converter

Convert a decimal integer to binary with grouped bits and division steps.

1cr · v2026-04-22

Decimal to Hex Converterdecimal-to-hex-converter

Convert a decimal integer to hexadecimal with conversion steps.

1cr · v2026-04-22

Decimal to Octal Converterdecimal-to-octal-converter

Convert a base-10 integer to octal with division steps.

1cr · v2026-04-22

Decimal to Scientific Notation Converterdecimal-to-scientific-notation-converter

Convert decimal numbers to scientific, E, and engineering notation.

1cr · v2026-04-22

Gray Code to Binary Convertergray-code-to-binary-converter

Convert Gray code to ordinary binary with XOR steps.

1cr · v2026-04-22

Hex Converterhex-converter

Convert integers between hexadecimal, decimal, binary, and octal.

1cr · v2026-04-22

Hex to BCD Converterhex-to-bcd-converter

Convert a hexadecimal integer to binary-coded decimal.

1cr · v2026-04-22

Hex to Binary Converterhex-to-binary-converter

Convert a hexadecimal integer to binary.

1cr · v2026-04-22

Hex to Decimal Converterhex-to-decimal-converter

Convert a hexadecimal integer to decimal with digit breakdown.

1cr · v2026-04-22

Hex to Octal Converterhex-to-octal-converter

Convert a hexadecimal integer to octal through binary grouping.

1cr · v2026-04-22

Octal Converteroctal-converter

Convert non-negative integers between octal, decimal, binary, and hex.

1cr · v2026-04-22

Octal to Binary Converteroctal-to-binary-converter

Convert an octal integer to binary with per-digit mapping.

1cr · v2026-04-22

Octal to Decimal Converteroctal-to-decimal-converter

Convert an octal integer to decimal with positional breakdown.

1cr · v2026-04-22

Ratio to Percentage Calculatorratio-to-percentage-calculator

Convert ratios, fractions, or decimal divisions to percentages.

1cr · v2026-04-22

Roman Numerals Converterroman-numerals-converter

Convert between Roman numerals and Arabic numbers (1-3999) with canonical-form checking.

1cr · v2026-04-22

Scientific Notation to Decimal Converterscientific-notation-to-decimal-converter

Convert scientific notation to ordinary decimal notation.

1cr · v2026-04-22

Number Theory

Amicable Number Checkeramicable-number-checker

Check whether two integers form an amicable pair, or find the partner of a single number.

1cr · v2026-04-22

Chinese Remainder Theorem Calculatorchinese-remainder-theorem-calculator

Solve a system of simultaneous congruences with pairwise coprime moduli using the CRT.

1cr · v2026-04-22

Continued Fraction Calculatorcontinued-fraction-calculator

Expand a decimal, fraction, or square root into a continued fraction with convergents.

1cr · v2026-04-22

Digital Root Calculatordigital-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

Divisibility Test Calculatordivisibility-test-calculator

Test a number against common divisors, primes, or custom divisors with rule explanations.

1cr · v2026-04-22

Egyptian Fraction Calculatoregyptian-fraction-calculator

Express a proper fraction as a sum of distinct unit fractions using the greedy Fibonacci-Sylvester algorithm.

1cr · v2026-04-22

Euler's Totient Function Calculatoreuler-s-totient-function-calculator

Calculate Euler's totient function phi(n) with its prime factorization.

1cr · v2026-04-22

Extended Euclidean Algorithm Calculatorextended-euclidean-algorithm-calculator

Find the GCD of two integers and Bezout coefficients via the extended Euclidean algorithm.

1cr · v2026-04-22

Factor Calculatorfactor-calculator

List all factors and factor pairs of a number up to 10^12 with its prime factorization.

1cr · v2026-04-22

Factorial Calculatorfactorial-calculator

Calculate factorial metadata, exact values for bounded inputs, and scientific notation.

1cr · v2026-04-22

Fibonacci Number Checkerfibonacci-number-checker

Check whether a non-negative integer is in the Fibonacci sequence.

1cr · v2026-04-22

First n Prime Numbersfirst-n-prime-numbers

Generate the first n primes (up to 10,000) with twin-prime pairs and gap statistics.

1cr · v2026-04-22

Goldbach Conjecture Verifiergoldbach-conjecture-verifier

Verify an even integer by finding prime pairs that sum to it.

1cr · v2026-04-22

Greatest Common Factor Calculatorgreatest-common-factor-calculator

Find the GCF of up to 15 numbers with prime factorizations and all common factors.

1cr · v2026-04-22

Prime Number Checkeris-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

Least Common Multiple Calculatorleast-common-multiple-calculator

Find the LCM of up to 15 numbers with prime factorizations and the GCF cross-check.

1cr · v2026-04-22

List of Prime Numberslist-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

Mersenne Prime Checkermersenne-prime-checker

Check whether 2^p - 1 is prime for bounded exponents.

1cr · v2026-04-22

Möbius Function Calculatormobius-function-calculator

Evaluate the Möbius function μ(n) from the prime factorization of n.

1cr · v2026-04-22

Modular Exponentiation Calculatormodular-exponentiation-calculator

Compute base^exponent mod modulus efficiently with binary square-and-multiply statistics.

1cr · v2026-04-22

Partition Function Calculatorpartition-function-calculator

Calculate the integer partition number p(n) for bounded n.

1cr · v2026-04-22

Perfect Number Checkerperfect-number-checker

Classify a positive integer as perfect, abundant, or deficient.

1cr · v2026-04-22

Prime Factor Calculatorprime-factor-calculator

Prime factors plus divisor sum, Euler's totient, and abundant/deficient/perfect classification.

1cr · v2026-04-22

Prime Factorization Calculatorprime-factorization-calculator

Factor a number up to 10^15 into primes with exponent form and divisor count.

1cr · v2026-04-22

Primitive Root Calculatorprimitive-root-calculator

Test whether primitive roots exist modulo n and list them with φ(n).

1cr · v2026-04-22

Twin Prime Findertwin-prime-finder

Find twin prime pairs up to a bounded integer limit.

1cr · v2026-04-22

Numerology

Destiny Number Calculatordestiny-number-calculator

Calculate a Pythagorean numerology destiny number from a name.

1cr · v2026-04-22

Payroll

Overtime Pay Calculatorovertime-pay-calculator

Calculate regular pay, overtime pay, gross pay, and effective hourly rate.

1cr · v2026-04-22

Percentage

Decimal to Percent Converterdecimal-to-percent-converter

Convert one or more decimal numbers to percentages.

1cr · v2026-04-22

Percent to Decimal Converterpercent-to-decimal-converter

Convert one or many percentages to decimals (divide by 100), batch input supported.

1cr · v2026-04-22

Percentage Calculatorpercentage-calculator

Six percentage operations behind one endpoint, selected by mode.

1cr · v2026-04-22

Percentage Change Calculatorpercentage-change-calculator

Calculate percentage change between two values with chart-ready before-and-after data.

1cr · v2026-04-22

Percentage Decrease Calculatorpercentage-decrease-calculator

Find a percentage decrease, apply one to a value, or recover the original value before a decrease.

1cr · v2026-04-22

Percentage Error Calculatorpercentage-error-calculator

Calculate percent error between estimated and actual values.

1cr · v2026-04-22

Percentages

Percent Growth Rate Calculatorpercent-growth-rate-calculator

Calculate total percent change, simple annual growth, CAGR, and multiplier.

1cr · v2026-04-22

Physics

Acceleration Calculatoracceleration-calculator

Calculate acceleration from velocity change, distance, force, centripetal motion, or free fall.

1cr · v2026-04-22

Boxing Punch Power Calculatorboxing-punch-power-calculator

Estimate punch force, kinetic energy, and power from speed and effective mass.

1cr · v2026-04-22

Headlight Beam Distance Calculatorheadlight-beam-distance-calculator

Calculate headlight beam road reach from mounting height and aim angle.

1cr · v2026-04-22

Horsepower Calculatorhorsepower-calculator

Solve horsepower, torque, or RPM and return common power conversions.

1cr · v2026-04-22

Penny Drop Impact Calculatorpenny-drop-impact-calculator

Estimate idealized penny impact velocity, energy, momentum, and force.

1cr · v2026-04-22

Speed Calculatorspeed-calculator

Calculate speed from distance and time with common speed unit conversions.

1cr · v2026-04-22

Planning

Parking Ratio Calculatorparking-ratio-calculator

Estimate parking spaces from common land-use parking ratios.

1cr · v2026-04-22

Probability

Bayes' Theorem Calculatorbayes-theorem-calculator

Calculate the posterior probability with Bayes' theorem, likelihood ratio, and natural frequencies.

1cr · v2026-04-22

Binomial Probability Distribution Calculatorbinomial-probability-distribution-calculator

Calculate exact and cumulative binomial probabilities.

1cr · v2026-04-22

Dice Roll Probability Calculatordice-roll-probability-calculator

Calculate exact probability metrics for sums of identical dice.

1cr · v2026-04-22

Exponential Distribution Calculatorexponential-distribution-calculator

Exponential distribution probabilities (P(X<=x), P(X>x), between) plus mean, median, and variance.

1cr · v2026-04-22

Gacha Pity Calculatorgacha-pity-calculator

Estimate pull success probability with soft and hard pity rates.

1cr · v2026-04-22

Geometric Distribution Calculatorgeometric-distribution-calculator

Compute PMF, CDF, survival, mean, and variance for a geometric distribution.

1cr · v2026-04-22

Hypergeometric Distribution Calculatorhypergeometric-distribution-calculator

Calculate exact and cumulative hypergeometric probabilities.

1cr · v2026-04-22

Loot Drop Probability Calculatorloot-drop-probability-calculator

Calculate loot drop odds across repeated independent attempts.

1cr · v2026-04-22

Negative Binomial Distribution Calculatornegative-binomial-distribution-calculator

Negative binomial PMF and cumulative probabilities in failures or total-trials parametrization.

1cr · v2026-04-22

Normal Distribution Calculatornormal-distribution-calculator

Normal probabilities: left/right tail, between two values, or inverse lookup, with z-scores and PDF.

1cr · v2026-04-22

Poisson Distribution Calculatorpoisson-distribution-calculator

Calculate Poisson PMF, CDF, and tail probabilities.

1cr · v2026-04-22

Probability Calculatorprobability-calculator

Compute basic, conditional, Bayes, and complement probabilities.

1cr · v2026-04-22

Ratios

Aspect Ratio Calculatoraspect-ratio-calculator

Simplify dimensions to a ratio, derive dimensions from a ratio, or resize proportionally.

1cr · v2026-04-22

Proportion Calculatorproportion-calculator

Solve or verify a proportion a/b = c/d from three or four values.

1cr · v2026-04-22

Ratio Calculatorratio-calculator

Solve a:b = c:d proportions, simplify or scale ratios, and generate equivalent ratio tables.

1cr · v2026-04-22

Unit Rate Calculatorunit-rate-calculator

Calculate a unit rate or compare two unit rates.

1cr · v2026-04-22

Sequence Tools

Catalan Number Generatorcatalan-number-generator

Calculate the nth Catalan number and nearby sequence values.

1cr · v2026-04-22

Collatz Conjecture Calculatorcollatz-conjecture-calculator

Generate and analyze the deterministic Collatz hailstone sequence.

1cr · v2026-04-22

Sequences

Arithmetic Sequence Calculatorarithmetic-sequence-calculator

Calculate the nth term and partial sum of an arithmetic sequence.

1cr · v2026-04-22

Cube Numbers Listcube-numbers-list

List cube numbers n³ for bases up to 1000 with sums and prime-base counts.

1cr · v2026-04-22

Geometric Sequence Calculatorgeometric-sequence-calculator

Calculate nth term, partial sum, and sample terms for a geometric sequence.

1cr · v2026-04-22

Happy Number Calculatorhappy-number-calculator

Check whether a number is happy or list happy numbers up to a limit.

1cr · v2026-04-22

List of Fibonacci Numberslist-of-fibonacci-numbers

Generate Fibonacci numbers by count, maximum value, or index range.

1cr · v2026-04-22

Pascal's Triangle Generatorpascal-s-triangle-generator

Generate Pascal's triangle rows and related row sums.

1cr · v2026-04-22

Sequence Calculatorsequence-calculator

Generate arithmetic, geometric, or Fibonacci-style sequence terms and sums.

1cr · v2026-04-22

Skip Counting Generatorskip-counting-generator

Generate an arithmetic skip-counting sequence.

1cr · v2026-04-22

Square Numbers Listsquare-numbers-list

List square numbers, find squares in a range, or check a perfect square.

1cr · v2026-04-22

Sum of Cubes Calculatorsum-of-cubes-calculator

Calculate 1^3 + 2^3 + ... + n^3.

1cr · v2026-04-22

Sum of Positive Integers Calculatorsum-of-positive-integers-calculator

Sum consecutive integers n1..n2 exactly with Gauss's pairing formula.

1cr · v2026-04-22

Sum of Squares Calculatorsum-of-squares-calculator

Calculate 1^2 + 2^2 + ... + n^2.

1cr · v2026-04-22

Set Theory

Inclusion Exclusion Calculatorinclusion-exclusion-calculator

Apply inclusion-exclusion for one, two, or three finite sets.

1cr · v2026-04-22

Set Theory Calculatorset-theory-calculator

Perform common finite set operations.

1cr · v2026-04-22

Special Functions

Beta Function Calculatorbeta-function-calculator

Calculate the Euler beta function B(x, y) via the gamma function relationship.

1cr · v2026-04-22

Sports

Bike Gear Ratio Calculatorbike-gear-ratio-calculator

Calculate bicycle gear ratio, gear inches, rollout, gain ratio, and speed.

1cr · v2026-04-22

Bowling Score Calculatorbowling-score-calculator

Score a ten-pin bowling game from roll values.

1cr · v2026-04-22

Cricket Run Rate Calculatorcricket-run-rate-calculator

Calculate current, projected, and required cricket run rates from cricket over notation.

1cr · v2026-04-22

Usage Rate Calculatorusage-rate-calculator

Calculate basketball usage rate from player and team shot, free throw, turnover, and minute stats.

1cr · v2026-04-22

Statistics

ANOVA Calculatoranova-calculator

Run one-way ANOVA with F statistic, p-value, table components, and effect sizes.

1cr · v2026-04-22

Arithmetic Mean Calculatorarithmetic-mean-calculator

Calculate arithmetic mean, median, modes, range, variance, and standard deviation from a number list.

1cr · v2026-04-22

Average Calculatoraverage-calculator

Calculate mean, median, mode, range, variance, and optional weighted average.

1cr · v2026-04-22

Average Deviation Calculatoraverage-deviation-calculator

Calculate mean and median absolute deviation for a numeric dataset.

1cr · v2026-04-22

Box and Whisker Plot Makerbox-and-whisker-plot-maker

Compute box plot statistics, whiskers, fences, and outliers.

1cr · v2026-04-22

Central Limit Theorem Calculatorcentral-limit-theorem-calculator

Sampling-distribution probabilities for the sample mean via the CLT (standard error, z-scores).

1cr · v2026-04-22

Chi Square Test Calculatorchi-square-test-calculator

Run a chi-square goodness-of-fit test for observed and expected counts.

1cr · v2026-04-22

Coefficient of Variation Calculatorcoefficient-of-variation-calculator

Calculate coefficient of variation from sample or population standard deviation.

1cr · v2026-04-22

Cohen's d Calculatorcohens-d-calculator

Calculate Cohen's d, Hedges' g, overlap, and effect-size interpretation.

1cr · v2026-04-22

Confidence Interval Calculatorconfidence-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

Confidence Interval for Proportion Calculatorconfidence-interval-for-proportion-calculator

Wald and Wilson score confidence intervals for a proportion at eight confidence levels.

1cr · v2026-04-22

Contingency Table Calculatorcontingency-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

Correlation Coefficient Calculatorcorrelation-coefficient-calculator

Calculate Pearson, Spearman, and Kendall correlation coefficients.

1cr · v2026-04-22

Effect Size Calculatoreffect-size-calculator

Calculate Cohen's d, Hedges' g, Glass's delta, and related effect-size statistics for two groups.

1cr · v2026-04-22

Entropy Calculatorentropy-calculator

Calculate Shannon entropy of a probability distribution in bits, nats, or dits.

1cr · v2026-04-22

Find Minimum and Maximumfind-minimum-maximum

Find min, max, range, mean, median, positions, and sorted values for a number list.

1cr · v2026-04-22

Fisher's Exact Test Calculatorfisher-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

Five Number Summary Calculatorfive-number-summary-calculator

Calculate minimum, Q1, median, Q3, maximum, IQR, and outlier fences.

1cr · v2026-04-22

Geometric Mean Calculatorgeometric-mean-calculator

Calculate geometric mean and compare it with arithmetic, harmonic, median, minimum, and maximum values.

1cr · v2026-04-22

Gini Coefficient Calculatorgini-coefficient-calculator

Calculate a Gini coefficient and Lorenz curve points from nonnegative data.

1cr · v2026-04-22

Harmonic Mean Calculatorharmonic-mean-calculator

Calculate harmonic mean for positive non-zero values with comparison means and reciprocal totals.

1cr · v2026-04-22

Histogram Makerhistogram-maker

Create histogram bin counts and relative frequencies from numeric data.

1cr · v2026-04-22

Interquartile Range Calculatorinterquartile-range-calculator

Calculate IQR, quartiles, and 1.5-IQR outlier fences.

1cr · v2026-04-22

Linear Regression Calculatorlinear-regression-calculator

Least-squares line with r, R-squared, standard errors, sums of squares, and optional prediction.

1cr · v2026-04-22

Mean Absolute Deviation Calculatormean-absolute-deviation-calculator

Calculate mean or median absolute deviation for a numeric dataset.

1cr · v2026-04-22

Mean Calculatormean-calculator

Calculate arithmetic mean and supporting summary statistics.

1cr · v2026-04-22

Mean Median Mode Calculatormean-median-mode-calculator

Calculate mean, median, mode, range, variance, and standard deviation.

1cr · v2026-04-22

Median Absolute Deviation Calculatormedian-absolute-deviation-calculator

Calculate raw and scaled median absolute deviation as a robust spread measure.

1cr · v2026-04-22

Median Calculatormedian-calculator

Calculate the median, sorted data, quartiles, and range.

1cr · v2026-04-22

Midrange Calculatormidrange-calculator

Calculate the midpoint between the minimum and maximum of a dataset.

1cr · v2026-04-22

Mode Calculatormode-calculator

Find the mode or modes and frequency table for a numeric dataset.

1cr · v2026-04-22

Odds Ratio Calculatorodds-ratio-calculator

Odds ratio with Woolf CI, relative risk, NNT, and Yates-corrected chi-square from a 2x2 table.

1cr · v2026-04-22

Outlier Calculatoroutlier-calculator

Detect IQR outliers and return quartiles, bounds, and counts.

1cr · v2026-04-22

P-Value Calculatorp-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

Percentile Calculatorpercentile-calculator

Calculate a percentile value or percentile rank for a numeric dataset.

1cr · v2026-04-22

Population Variance Calculatorpopulation-variance-calculator

Calculate population variance and population standard deviation.

1cr · v2026-04-22

Quartile Calculatorquartile-calculator

Calculate Q1, Q2, Q3, IQR, and outlier fences using a selected quartile method.

1cr · v2026-04-22

Quartile Deviation Calculatorquartile-deviation-calculator

Calculate quartile deviation, IQR fences, and outliers for numeric data.

1cr · v2026-04-22

Range Calculatorrange-calculator

Range (max − min) of a data set with quartiles, IQR, midrange, and a spread rating.

1cr · v2026-04-22

Relative Risk Calculatorrelative-risk-calculator

Relative risk with confidence interval, attributable fractions, NNT, and significance test.

1cr · v2026-04-22

Relative Standard Deviation Calculatorrelative-standard-deviation-calculator

Calculate RSD, coefficient of variation, and precision quality for data.

1cr · v2026-04-22

Root Mean Square Calculatorroot-mean-square-calculator

Calculate root mean square for a numeric list.

1cr · v2026-04-22

Sample Mean Calculatorsample-mean-calculator

Calculate sample mean plus core descriptive statistics for a numeric dataset.

1cr · v2026-04-22

Sample Size Calculatorsample-size-calculator

Survey sample size from confidence level, margin of error, and optional finite-population correction.

1cr · v2026-04-22

Sample Standard Deviation Calculatorsample-standard-deviation-calculator

Calculate sample standard deviation and optional z-score outliers.

1cr · v2026-04-22

Sample Variance Calculatorsample-variance-calculator

Calculate sample or population variance from a numeric dataset.

1cr · v2026-04-22

Spearman Rank Correlation Calculatorspearman-rank-correlation-calculator

Spearman's rho with average-rank tie handling, tie correction, and t-based significance.

1cr · v2026-04-22

Standard Deviation Calculatorstandard-deviation-calculator

Calculate sample and population standard deviation with quartiles.

1cr · v2026-04-22

Standard Error Calculatorstandard-error-calculator

Calculate standard error of the mean and a z-based confidence interval.

1cr · v2026-04-22

Statistics Calculatorstatistics-calculator

Calculate descriptive statistics and histogram-ready distribution data from numeric values.

1cr · v2026-04-22

t-Test Calculatort-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

Variance Calculatorvariance-calculator

Calculate sample and population variance with related statistics.

1cr · v2026-04-22

Weibull Distribution Calculatorweibull-distribution-calculator

Calculate Weibull PDF/CDF/reliability, moments, and B-life values.

1cr · v2026-04-22

Weighted Average Calculatorweighted-average-calculator

Calculate a weighted average from value and weight lists.

1cr · v2026-04-22

Z-Score Calculatorzscore-calculator

Calculate z-scores, inverse values, percentiles, and normal probabilities.

1cr · v2026-04-22

Surface Area

Surface Area of a Cone Calculatorsurface-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

Surface Area of a Cube Calculatorsurface-area-of-a-cube-calculator

Calculate cube surface area and related measurements from edge, diagonal, volume, or surface area.

1cr · v2026-04-22

Time

Commute Life Wasted Calculatorcommute-life-wasted-calculator

Estimate weekly, yearly, and career time spent commuting.

1cr · v2026-04-22

Trigonometry

Arccos Calculatorarccos-calculator

Calculate inverse cosine in radians and degrees.

1cr · v2026-04-22

Arcsin Calculatorarcsin-calculator

Calculate arcsine from a sine value, including degree/radian output and special-angle recognition.

1cr · v2026-04-22

Arctan Calculatorarctan-calculator

Calculate inverse tangent in radians and degrees.

1cr · v2026-04-22

Arctan2 Calculatorarctan2-calculator

Calculate atan2(y, x), normalized angle, radius, slope, and quadrant.

1cr · v2026-04-22

Cosine Calculatorcosine-calculator

Calculate cosine with radians/degrees conversion, quadrant, and special-angle recognition.

1cr · v2026-04-22

Cosecant/Secant/Cotangent Calculatorcsc-sec-cot-calculator

Calculate csc, sec, cot, sine, and cosine for an angle.

1cr · v2026-04-22

Degree to Radian Converterdegree-to-radian-converter

Convert degrees to radians with pi-fraction, quadrant, and trig values.

1cr · v2026-04-22

DMS to Decimal Degrees Converterdms-to-decimal-converter

Convert degrees, minutes, and seconds to signed decimal degrees.

1cr · v2026-04-22

Law of Cosines Calculatorlaw-of-cosines-calculator

Use the law of cosines to solve a side or included angle.

1cr · v2026-04-22

Law of Sines Calculatorlaw-of-sines-calculator

Use the law of sines to solve a side or possible angle.

1cr · v2026-04-22

Sine Calculatorsine-calculator

Calculate sine with radians/degrees conversion, quadrant, and special-angle recognition.

1cr · v2026-04-22

Tangent Calculatortangent-calculator

Calculate tangent and flag vertical-asymptote inputs.

1cr · v2026-04-22

Unit Circle Calculatorunit-circle-calculator

Calculate unit-circle sine, cosine, tangent, radians, degrees, and point coordinates.

1cr · v2026-04-22

Unit Conversion

Length Converterlength-converter

Convert a length value across metric, imperial, and nautical units.

1cr · v2026-04-22

Unit Converters

Acres to Hectares Converteracres-to-hectares-converter

Convert between acres and hectares with related area units.

1cr · v2026-04-22

Acres to Perches Converteracres-to-perches-converter

Convert acres and perches for land area calculations.

1cr · v2026-04-22

Acres to Square Feet Converteracres-to-square-feet-converter

Convert between acres and square feet with related area units.

1cr · v2026-04-22

Acres to Square Meters Converteracres-to-square-meters-converter

Convert between acres and square meters with related area units.

1cr · v2026-04-22

Acres to Square Miles Converteracres-to-square-miles-converter

Convert acres and square miles, including related land-area units.

1cr · v2026-04-22

Acres to Square Yards Converteracres-to-square-yards-converter

Convert acres and square yards, including related area units.

1cr · v2026-04-22

Angle Converterangle-converter

Convert angles between degrees, radians, gradians, turns, arcminutes, arcseconds, and milliradians.

1cr · v2026-04-22

CM to Inches Convertercm-to-inches-converter

Convert centimeters to inches, feet/inches, and nearest 1/16-inch fraction.

1cr · v2026-04-22

Cups to Tablespoons Convertercups-to-tablespoons-converter

Convert US cups and tablespoons, including teaspoons and fluid ounces.

1cr · v2026-04-22

Feet to Meters Converterfeet-to-meters-converter

Convert feet and optional inches to meters, centimeters, and millimeters.

1cr · v2026-04-22

Gallons to Cups Convertergallons-to-cups-converter

Convert US gallons and cups, with quart and pint equivalents.

1cr · v2026-04-22

Grams to Ounces Convertergrams-to-ounces-converter

Convert grams to ounces, pounds, kilograms, and milligrams.

1cr · v2026-04-22

Grams to Pounds Convertergrams-to-pounds-converter

Convert grams to pounds, ounces, and kilograms.

1cr · v2026-04-22

Inches to CM Converterinches-to-cm-converter

Convert inches to centimeters, millimeters, meters, and feet.

1cr · v2026-04-22

kg to lbs Converterkg-to-lbs-converter

Convert kilograms and pounds with ounce breakdown.

1cr · v2026-04-22

kPa to psi Converterkpa-to-psi-converter

Convert kilopascals to psi, bar, atm, and mmHg.

1cr · v2026-04-22

Liters to Cups Converterliters-to-cups-converter

Convert liters to US, metric, and imperial cups.

1cr · v2026-04-22

Meters to Feet Convertermeters-to-feet-converter

Convert meters to decimal feet and feet-and-inches.

1cr · v2026-04-22

Ounce to Gram Converterounce-to-gram-converter

Convert ounces to grams, kilograms, milligrams, and pounds.

1cr · v2026-04-22

Ounces to Cups Converterounces-to-cups-converter

Convert US fluid ounces and cups with spoon and milliliter equivalents.

1cr · v2026-04-22

Percent to PPM Converterpercent-to-ppm-converter

Convert percent to ppm or ppm to percent.

1cr · v2026-04-22

Perches to Acres Converterperches-to-acres-converter

Convert perches and acres for land area calculations.

1cr · v2026-04-22

Pounds to Grams Converterpounds-to-grams-converter

Convert pounds to grams, kilograms, ounces, and milligrams.

1cr · v2026-04-22

PPM to Percent Converterppm-to-percent-converter

Convert parts per million to percentage and related concentration scales.

1cr · v2026-04-22

Square Yards to Acres Convertersquare-yards-to-acres-converter

Convert square yards and acres, including related area units.

1cr · v2026-04-22

Tablespoons to Cups Convertertablespoons-to-cups-converter

Convert US tablespoons to cups, teaspoons, fluid ounces, and milliliters.

1cr · v2026-04-22

Tablespoons to Teaspoons Convertertablespoons-to-teaspoons-converter

Convert US tablespoons to teaspoons, cups, fluid ounces, and milliliters.

1cr · v2026-04-22

Teaspoons to Cups Converterteaspoons-to-cups-converter

Convert US teaspoons and cups, including tablespoons and fluid ounces.

1cr · v2026-04-22

Teaspoons to Tablespoons Converterteaspoons-to-tablespoons-converter

Convert US teaspoons to tablespoons, cups, fluid ounces, and milliliters.

1cr · v2026-04-22

Volume

Cups to Gallons Convertercups-to-gallons-converter

Convert US cups and gallons with related volume units.

1cr · v2026-04-22

Cups to Liters Convertercups-to-liters-converter

Convert US cups and liters with milliliter, fluid-ounce, and spoon equivalents.

1cr · v2026-04-22

Cups to Ounces Convertercups-to-ounces-converter

Convert cups and fluid ounces for US customary, US legal, imperial, or metric cups.

1cr · v2026-04-22

Cups to Quarts Convertercups-to-quarts-converter

Convert US cups and quarts with related volume units.

1cr · v2026-04-22

Cups to Teaspoons Convertercups-to-teaspoons-converter

Convert US cups and teaspoons with tablespoon and fluid-ounce equivalents.

1cr · v2026-04-22

Volume of a Cone Calculatorvolume-of-a-cone-calculator

Calculate cone volume, slant height, base area, lateral area, and total surface area.

1cr · v2026-04-22

Volume of a Cube Calculatorvolume-of-a-cube-calculator

Calculate cube volume, surface area, face area, diagonals, and total edge length.

1cr · v2026-04-22

Volume of a Pyramid Calculatorvolume-of-a-pyramid-calculator

Calculate volume, base area, slant height, and surface area for square, rectangular, or triangular pyramids.

1cr · v2026-04-22

Volume of a Rectangular Prism Calculatorvolume-of-a-rectangular-prism-calculator

Calculate rectangular prism volume, surface area, diagonals, base perimeter, and total edge length.

1cr · v2026-04-22

Volume of Ellipsoid Calculatorvolume-of-ellipsoid-calculator

Calculate ellipsoid volume, approximate surface area, cross sections, equivalent sphere radius, and shape type.

1cr · v2026-04-22

Volume Converters

Cubic Meters to Cubic Feetcubic-meters-to-cubic-feet

Convert cubic meters and cubic feet with common volume equivalents.

1cr · v2026-04-22

Gallons to Liters Convertergallons-to-liters-converter

Convert US or UK gallons to liters, with a reverse conversion mode.

1cr · v2026-04-22