> For the complete documentation index, see [llms.txt](/llms.txt).
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# Math API

207 endpoints — Percentage, unit conversion, geometry, and sequences. Same auth, same credit pool, same JSON envelope. Use them directly from apps, content sites, workflows, or agents without rebuilding formulas, validation, and docs for each tool.
[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/)
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/) [
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/) [
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/) [
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/)
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/)
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/)
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/)
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/)
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/)
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/)
Exponents
[
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/)
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 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/)
Functions
[
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/) [
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/) [
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/) [
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/) [
Slope Calculator slope-calculator
Calculate slope, angle, intercepts, and line equation from two points.
1cr · v2026-04-22
](/tools/slope-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/)
Geometry Calculators
[
Torus Calculator torus-calculator
Calculate torus volume, surface area, and key radii.
1cr · v2026-04-22
](/tools/torus-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/)
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/) [
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/)
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 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 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 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 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/) [
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
[
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/) [
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/)
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/) [
Percentage Calculator percentage-calculator
Six percentage operations behind one endpoint, selected by mode.
1cr · v2026-04-22
](/tools/percentage-calculator/) [
Percentage Error Calculator percentage-error-calculator
Calculate percent error between estimated and actual values.
1cr · v2026-04-22
](/tools/percentage-error-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/) [
Horsepower Calculator horsepower-calculator
Solve horsepower, torque, or RPM and return common power conversions.
1cr · v2026-04-22
](/tools/horsepower-calculator/)
Probability
[
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/)
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/) [
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/) [
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/) [
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 Squares Calculator sum-of-squares-calculator
Calculate 1^2 + 2^2 +... + n^2.
1cr · v2026-04-22
](/tools/sum-of-squares-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/) [
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
[
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/) [
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/) [
Correlation Coefficient Calculator correlation-coefficient-calculator
Calculate Pearson, Spearman, and Kendall correlation coefficients.
1cr · v2026-04-22
](/tools/correlation-coefficient-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/) [
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/) [
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/) [
Interquartile Range Calculator interquartile-range-calculator
Calculate IQR, quartiles, and 1.5-IQR outlier fences.
1cr · v2026-04-22
](/tools/interquartile-range-calculator/) [
Mean Calculator mean-calculator
Calculate arithmetic mean and supporting summary statistics.
1cr · v2026-04-22
](/tools/mean-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/) [
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/) [
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 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/) [
Standard Deviation Calculator standard-deviation-calculator
Calculate sample and population standard deviation with quartiles.
1cr · v2026-04-22
](/tools/standard-deviation-calculator/) [
Variance Calculator variance-calculator
Calculate sample and population variance with related statistics.
1cr · v2026-04-22
](/tools/variance-calculator/) [
Z-Score Calculator zscore-calculator
Calculate z-scores, inverse values, percentiles, and normal probabilities.
1cr · v2026-04-22
](/tools/zscore-calculator/)
Surface Area
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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/)
Trigonometry
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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/) [
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 Converters
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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/) [
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/) [
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/) [
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
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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/)
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