Calculator category
Math Calculators
Free math calculators for arithmetic, algebra, geometry, statistics, probability, and everyday calculations.
100 published calculators in this category.
Solve the calculation, then understand the method
Math calculators are most useful when the result is accompanied by the steps or formula behind it. Use the inputs and examples on each page to check your work and understand how the result was obtained.
- โ Enter values exactly as intended, including negative signs and fractions.
- โ Check units and rounding when a problem involves measurements.
- โ Use worked examples and formula explanations to verify the result.
Browse math calculators
Choose a tool below to calculate a result and review the method behind it.
Percentage Calculator
Calculate percentages instantly. Find what % of a number is, what percent one number is of another, or % change.
Open calculator โPercentage Increase Calculator
Percentage Increase Calculator with verified inputs, formula, and calculation logic.
Open calculator โPercentage Decrease Calculator
Percentage Decrease Calculator with verified inputs, formula, and calculation logic.
Open calculator โAverage Calculator
Calculate average with explicit client-side inputs.
Open calculator โSquare Root Calculator
Square Root Calculator with verified inputs, formula, and calculation logic.
Open calculator โExponent Calculator
Calculate a number raised to a power.
Open calculator โCircumference Calculator
Circumference Calculator with verified inputs, formula, and calculation logic.
Open calculator โSlope Calculator
Calculate slope and intercept from two points.
Open calculator โPythagorean Theorem Calculator
Calculate pythagorean theorem with guarded client-side formulas.
Open calculator โSpeed Calculator
Calculate average speed from distance in miles and elapsed time in hours.
Open calculator โDensity Calculator
Calculate density from mass and volume with explicit gram and cubic-centimeter units.
Open calculator โMolarity Calculator
Calculate solution molarity from moles of solute and final volume in liters.
Open calculator โProbability Calculator
Calculate probability using explicit client-side inputs.
Open calculator โZ-score Calculator
Calculate z-score from explicit statistical inputs.
Open calculator โVolume Calculator
Calculate rectangular-prism volume.
Open calculator โRatio Calculator
Simplify a ratio and show its decimal form.
Open calculator โProportion Calculator
Proportion Calculator with verified inputs, formula, and calculation logic.
Open calculator โGCD Calculator
GCD Calculator with verified inputs, formula, and calculation logic.
Open calculator โLCM Calculator
LCM Calculator with verified inputs, formula, and calculation logic.
Open calculator โFactorial Calculator
Calculate n factorial for a non-negative integer.
Open calculator โPermutation Calculator
Permutation Calculator with verified inputs, formula, and calculation logic.
Open calculator โCombination Calculator
Calculate unordered combinations from n items selecting r.
Open calculator โQuadratic Equation Calculator
Quadratic Equation Calculator with verified inputs, formula, and calculation logic.
Open calculator โAbsolute Value Calculator
Absolute Value Calculator with verified inputs, formula, and calculation logic.
Open calculator โFraction to Decimal Calculator
Fraction to Decimal Calculator with verified inputs, formula, and calculation logic.
Open calculator โDecimal to Fraction Calculator
Decimal to Fraction Calculator with verified inputs, formula, and calculation logic.
Open calculator โOhmโs Law Calculator
Calculate resistance and power from entered voltage and current.
Open calculator โStandard Deviation Calculator
Calculate population standard deviation and mean for four inputs.
Open calculator โCube Root Calculator
Cube Root Calculator with verified inputs, formula, and calculation logic.
Open calculator โModulo Calculator
Modulo Calculator with verified inputs, formula, and calculation logic.
Open calculator โRounding Calculator
Round a value to a selected number of decimal places.
Open calculator โWeighted Average Calculator
Weighted Average Calculator with verified inputs, formula, and calculation logic.
Open calculator โGeometric Mean Calculator
Geometric Mean Calculator with verified inputs, formula, and calculation logic.
Open calculator โHarmonic Mean Calculator
Harmonic Mean Calculator with verified inputs, formula, and calculation logic.
Open calculator โRoot Calculator
Calculate an nth root.
Open calculator โSignificant Figures Calculator
Significant Figures Calculator with verified inputs, formula, and calculation logic.
Open calculator โAbsolute Change Calculator
Absolute Change Calculator with verified inputs, formula, and calculation logic.
Open calculator โUnit Rate Calculator
Unit Rate Calculator with verified inputs, formula, and calculation logic.
Open calculator โConfidence Interval Calculator
Calculate confidence interval from explicit statistical inputs.
Open calculator โPercentile Calculator
Estimate the median percentile from four displayed observations.
Open calculator โSquare Calculator
Square Calculator with verified inputs, formula, and calculation logic.
Open calculator โCube Calculator
Cube Calculator with verified inputs, formula, and calculation logic.
Open calculator โRectangle Perimeter Calculator
Rectangle Perimeter Calculator with verified inputs, formula, and calculation logic.
Open calculator โTriangle Perimeter Calculator
Triangle Perimeter Calculator with verified inputs, formula, and calculation logic.
Open calculator โCircle Area Calculator
Circle Area Calculator with verified inputs, formula, and calculation logic.
Open calculator โCircle Diameter Calculator
Circle Diameter Calculator with verified inputs, formula, and calculation logic.
Open calculator โArc Length Calculator
Arc Length Calculator with verified inputs, formula, and calculation logic.
Open calculator โSector Area Calculator
Sector Area Calculator with verified inputs, formula, and calculation logic.
Open calculator โHeron's Formula Calculator
Heron's Formula Calculator with verified inputs, formula, and calculation logic.
Open calculator โDistance Between Points Calculator
Distance Between Points Calculator with verified inputs, formula, and calculation logic.
Open calculator โMidpoint Calculator
Midpoint Calculator with verified inputs, formula, and calculation logic.
Open calculator โScientific Calculator
Evaluate common scientific functions with safe client-side inputs.
Open calculator โFraction Calculator
Add and reduce two fractions.
Open calculator โQuadratic Formula Calculator
Solve a quadratic equation and report its discriminant.
Open calculator โLog Calculator
Calculate a logarithm for a positive value and valid base.
Open calculator โPercent Error Calculator
Calculate absolute percent error against a theoretical value.
Open calculator โTriangle Calculator
Calculate right-triangle area and hypotenuse.
Open calculator โNumber Sequence Calculator
Generate an arithmetic sequence and sum.
Open calculator โBinary Calculator
Convert a non-negative integer to binary.
Open calculator โHex Calculator
Convert a non-negative integer to hexadecimal.
Open calculator โHalf-Life Calculator
Calculate remaining quantity after radioactive-style decay.
Open calculator โArea Calculator
Calculate area using explicit client-side inputs.
Open calculator โDistance Calculator
Calculate distance using explicit client-side inputs.
Open calculator โSample Size Calculator
Calculate sample size using explicit client-side inputs.
Open calculator โStatistics Calculator
Calculate statistics using explicit client-side inputs.
Open calculator โPermutation and Combination Calculator
Calculate permutation and combination using explicit client-side inputs.
Open calculator โAverage Rating Calculator
Calculate a weighted star-rating average from vote counts.
Open calculator โLeast to Greatest Calculator
Sort displayed observations from least to greatest.
Open calculator โPercentile Rank Calculator
Estimate the share of observations at or below a selected value.
Open calculator โLinear Combination Calculator
Solve two linear equations in two variables with elimination.
Open calculator โCircle Calculator
Calculate circle with guarded client-side formulas.
Open calculator โSurface Area Calculator
Calculate surface area with guarded client-side formulas.
Open calculator โRight Triangle Calculator
Calculate right triangle with guarded client-side formulas.
Open calculator โLeast Common Multiple Calculator
Calculate least common multiple with guarded client-side formulas.
Open calculator โGreatest Common Factor Calculator
Calculate greatest common factor with guarded client-side formulas.
Open calculator โPrime Factorization Calculator
Calculate prime factorization with guarded client-side formulas.
Open calculator โMean, Median, Mode, Range Calculator
Calculate mean, median, mode, range from explicit statistical inputs.
Open calculator โFactor Calculator
Calculate factor with explicit client-side inputs.
Open calculator โMatrix Calculator
Calculate matrix with explicit client-side inputs.
Open calculator โBasic Calculator
Calculate basic with explicit client-side inputs.
Open calculator โLong Division Calculator
Calculate long division with explicit client-side inputs.
Open calculator โP-value Calculator
Calculate p-value with explicit client-side inputs.
Open calculator โGPA Calculator
Calculate your weighted and unweighted GPA. Supports regular, honors, and AP/IB courses on a 4.0 scale.
Open calculator โScientific Notation Calculator
Convert a number to normalized scientific notation with a coefficient and base-10 exponent.
Open calculator โBig Number Calculator
Add arbitrarily large whole numbers without losing integer precision in the browser.
Open calculator โCommon Factor Calculator
List the positive integer factors shared by two whole numbers.
Open calculator โGrade Calculator
Convert points earned out of points possible into a percentage and simple letter band.
Open calculator โIP Subnet Calculator
Calculate IPv4 network, broadcast, host range, and address capacity from CIDR notation.
Open calculator โConversion Calculator
Convert length values between metric and imperial units with explicit source and target labels.
Open calculator โBandwidth Calculator
Convert transferred megabytes and elapsed seconds into average throughput.
Open calculator โBase64 Encode / Decode
Encode or decode UTF-8 text using standard Base64 representation.
Open calculator โURL Encode / Decode
Encode or decode URI component text with percent escapes.
Open calculator โRandom Number Generator
Generate repeatable or fresh integer sequences within an inclusive range, with duplicate and sort controls.
Open calculator โGDP Calculator
Estimate GDP using consumer spending, investment, government spending, exports, and imports.
Open calculator โHorsepower Calculator
Convert watts to named mechanical and electrical horsepower conventions.
Open calculator โResistor Calculator
Calculate nominal resistance and tolerance range from two digits, a multiplier, and tolerance.
Open calculator โMass Calculator
Convert kilograms to grams and pounds with labeled mass units.
Open calculator โWeight Calculator
Convert mass in kilograms to gravitational force in newtons using standard gravity.
Open calculator โMolecular Weight Calculator
Estimate molar mass for supported simple chemical formulas.
Open calculator โRoman Numeral Converter
Convert supported integers to Roman numerals and decode Roman symbols.
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