Math tools
150 focused tools, ready to use in your browser.
Percentage Change Calculator
Measure an increase or decrease relative to an original value, with the signed difference shown.
MathPercentage Points Calculator
Compare two percentage rates using both percentage-point difference and relative percentage change.
MathRatio Calculator
Simplify a whole-number ratio and see each part as a share of the combined total.
MathFraction Calculator
Add, subtract, multiply, or divide two fractions and reduce the exact result.
MathWeighted Average Calculator
Calculate an average from paired values and nonnegative weights without manually normalizing weights.
MathDescriptive Statistics Calculator
Summarize a numeric list with mean, median, modes, range, count, and sum.
MathStandard Deviation Calculator
Measure spread using sample or population variance and standard deviation for a numeric list.
MathGeometric Mean Calculator
Find the multiplicative average of positive observations using a logarithmic calculation.
MathHarmonic Mean Calculator
Average positive rates using the reciprocal-based harmonic mean.
MathRoot Mean Square Calculator
Calculate RMS magnitude for a list of signed or unsigned observations.
MathCombinations and Permutations Calculator
Count selections and ordered arrangements without repetition using exact integer arithmetic.
MathFactorial Calculator
Compute the exact factorial of a nonnegative whole number, including 0!.
MathBinomial Probability Calculator
Find exact-count and cumulative probabilities for independent trials with a fixed success chance.
MathZ-score Calculator
Standardize a value relative to a supplied mean and positive standard deviation.
MathPrime Number Checker
Determine primality for whole numbers up to 4,294,967,295 using bounded deterministic testing.
MathGCD and LCM Calculator
Find the greatest common divisor and least common multiple of a list of whole numbers.
MathScientific Notation Converter
Express a decimal or exponent-form number in scientific and engineering notation.
MathSignificant Figures Calculator
Round a numeric value to a chosen count of significant figures while retaining trailing zeros.
MathTriangle Calculator
Solve a triangle from three side lengths: area, perimeter, and all three angles.
MathCircle Calculator
Calculate circle area, circumference, and diameter from a positive radius.
MathRectangle Calculator
Find rectangle area, perimeter, diagonal, and aspect ratio from two side lengths.
MathCylinder Calculator
Calculate volume and total or lateral surface area for a right circular cylinder.
MathSphere Calculator
Find sphere volume, surface area, and diameter from its radius.
MathQuadratic Equation Solver
Solve ax² + bx + c = 0, including repeated and complex roots, with a stable real-root formula.
MathTwo-variable Linear System Solver
Solve two simultaneous linear equations ax + by = c and dx + ey = f.
MathLinear Regression Calculator
Fit a straight line to paired observations and report slope, intercept, and R².
MathMatrix Operations Calculator
Add or multiply bounded matrices, or compute a square matrix determinant or inverse.
MathPolynomial Evaluation Calculator
Evaluate a coefficient-defined polynomial and its derivative at a list of points.
MathTabulated Numerical Integration Calculator
Estimate signed area under supplied samples using the composite trapezoidal rule.
MathLinear Interpolation Calculator
Estimate values inside ordered sample intervals and identify their bracketing coordinates.
MathVector and Coordinate Calculator
Find dot product, magnitude, displacement distance, angle, and three-dimensional cross product.
MathComplex Number Calculator
Add, subtract, multiply, or divide two complex values with explicit rectangular components.
MathLogarithm and Exponent Calculator
Evaluate a real logarithm or power with explicit base and domain checks.
MathArithmetic and Geometric Sequence Calculator
Find a progression’s nth term and finite sum with explicit zero-count and unit-ratio behavior.
MathModular Arithmetic Calculator
Calculate exact modular powers or inverses for bounded whole numbers.
MathInteger Factorization Calculator
Factor a bounded positive integer into exact prime powers and verify reconstruction.
MathChinese Remainder Theorem Calculator
Solve compatible residue and modulus pairs, including noncoprime moduli.
MathCoordinate Polygon Area Calculator
Measure a simple Cartesian polygon from ordered vertices, including its signed orientation.
MathCone and Frustum Calculator
Calculate volume and open or closed surface area for a right circular frustum, including a cone.
MathEllipse Calculator
Calculate ellipse area and a converged numerical perimeter from two semiaxes.
MathRectangular Prism Calculator
Find box volume, closed surface area, and space diagonal from three positive lengths.
MathGreat-circle Distance and Bearing Calculator
Estimate spherical surface distance and initial bearing between two latitude/longitude pairs.
MathOhm’s Law and DC Power Calculator
Solve voltage, current, resistance, and power from an explicit independent input pair.
MathSeries and Parallel Resistor Calculator
Reduce a bounded list of ideal resistances in one simple series or parallel topology.
MathRC Transient Calculator
Model an ideal first-order capacitor voltage after a DC step or discharge.
MathPace and Even Split Calculator
Calculate measured pace, speed, and equal-distance split durations from an elapsed activity.
MathNormal Distribution Calculator
Find a normal cumulative probability, upper tail, or inverse quantile with a supplied mean and deviation.
MathPoisson Probability Calculator
Evaluate an event-count probability and both cumulative tails for a supplied expected count.