Math & statistics
calculators

Everyday arithmetic, algebra, probability, and descriptive statistics.

24 tools. Calculations run locally and every page explains its method.

  1. Math & statisticsAP & GP CalculatorFind the nth term and finite sum of an arithmetic or geometric progression, with a term preview and worked steps.
  2. Math & statisticsTriangle SolverSolve SSS, SAS, ASA and AAS triangles: find all sides, angles, area and perimeter with labelled geometry and worked steps.
  3. Math & statisticsQuadratic Equation SolverSolve ax² + bx + c = 0 with real or complex roots, a discriminant, worked steps and substitution checks.
  4. Math & statisticsLinear Equation SolverSolve two- or three-variable simultaneous equations with exact elimination steps and unique, infinite or no-solution results.
  5. Math & statisticsPercentage CalculatorSolve common “what percent,” “percent of,” and “value from percentage” questions.
  6. Math & statisticsPercentage Increase / Decrease CalculatorMeasure percentage increase or decrease between an original and new value.
  7. Math & statisticsPercentage Difference CalculatorCompare two values symmetrically using their average as the reference.
  8. Math & statisticsFraction CalculatorAdd, subtract, multiply, or divide fractions and simplify the result.
  9. Math & statisticsRatio CalculatorSimplify ratios and scale a known ratio to a target total or term.
  10. Math & statisticsProbability CalculatorCalculate single-event, union, intersection, complement, and repeated-event probabilities.
  11. Math & statisticsAverage CalculatorCalculate the arithmetic mean and total for a list of numbers.
  12. Math & statisticsMean / Median / Mode CalculatorSummarise a data set using mean, median, modes, range, and count.
  13. Math & statisticsStandard Deviation CalculatorCalculate population or sample standard deviation and variance.
  14. Math & statisticsVariance CalculatorMeasure population or sample variance from a numerical data set.
  15. Math & statisticsStandard Error CalculatorCalculate the standard error of a mean from a sample deviation and sample size.
  16. Math & statisticsZ-Score CalculatorStandardise a value using a known mean and standard deviation.
  17. Math & statisticsPermutation & Combination CalculatorCount ordered permutations and unordered combinations for n objects chosen r at a time.
  18. Math & statisticsLCM & GCD CalculatorFind the least common multiple and greatest common divisor of integers.
  19. Math & statisticsScientific CalculatorEvaluate common trigonometric, exponential, logarithmic, and rounding operations safely.
  20. Math & statisticsExponent / Power CalculatorRaise a base to a positive, negative, fractional, or zero exponent.
  21. Math & statisticsSquare Root CalculatorFind real or complex principal square roots, distinguish both equation solutions, and check perfect squares.
  22. Math & statisticsLogarithm CalculatorCalculate logarithms with base 10, e, 2, or a custom positive base other than one, with the working shown.
  23. Math & statisticsVolume CalculatorCalculate volume for boxes, cylinders, spheres, cones, and other common solids.
  24. Math & statisticsCubic Feet CalculatorConvert length, width, height, and quantity into cubic feet and cubic metres.