Math Calculators
Algebra, geometry, statistics & calculus. · 39 calculators
Everyday Math
· 7 toolsPercentage CalculatorWork out percentages, increases, and decreases.Fraction CalculatorAdd, subtract, multiply, and simplify fractions.Percentage Change CalculatorFind the percent increase or decrease between values.Ratio CalculatorSimplify, scale, and solve ratios and proportions.Percent Error CalculatorCalculate percent error against a true value.Proportion CalculatorSolve for the missing term in a proportion.Rounding CalculatorRound numbers to any place value.
General
· 2 toolsStatistics
· 7 toolsStandard Deviation CalculatorCompute standard deviation, variance, and mean.Mean, Median, Mode CalculatorFind averages and spread for a data set.Z-Score CalculatorConvert a value to a standard z-score.Probability CalculatorCalculate probability of single and combined events.Permutations & Combinations CalculatorCount arrangements and selections (nPr, nCr).Confidence Interval CalculatorCompute a confidence interval for a mean.Sample Size CalculatorFind the sample size needed for a survey.
Algebra
· 5 toolsQuadratic Formula CalculatorSolve quadratic equations and find the roots.Exponent CalculatorRaise numbers to a power with steps.Logarithm CalculatorEvaluate logs in any base: log, ln, and log base 2.Square Root CalculatorFind square roots and nth roots.Half-Life CalculatorCalculate half-life, decay, and remaining amount.
Geometry
· 11 toolsSlope CalculatorFind slope and equation of a line from two points.Distance CalculatorCalculate distance between two points.Pythagorean Theorem CalculatorSolve right-triangle sides with a² + b² = c².Area CalculatorFind the area of common 2D shapes.Volume CalculatorFind the volume of common 3D shapes.Circle CalculatorCompute radius, area, and circumference.Triangle CalculatorSolve triangle sides, angles, and area.Perimeter CalculatorFind the perimeter of common shapes.Surface Area CalculatorFind the surface area of 3D shapes.Midpoint CalculatorFind the midpoint between two points.Right Triangle CalculatorSolve right-triangle sides and angles.