Mathematics & Statistics calculators
Percentages, fractions, statistics, probability, algebra, matrices and trig.
Fractions CalculatorAdd, subtract, multiply and divide fractions and mixed numbers; simplify; decimal to exact fraction.Mathematics & StatisticsLinear Regression CalculatorLeast-squares best-fit line y = a + bx: slope, intercept, r, R², standard errors and prediction.Mathematics & StatisticsLogarithm Calculatorlog of x to base 10, e, 2 or any base; antilog b^y; or the base b for given x and y.Mathematics & StatisticsMatrix CalculatorDeterminant, rank, inverse, A × B, A + B, A − B and transpose for matrices up to 6 × 6.Mathematics & StatisticsMean, Median & Mode CalculatorMean (average), median, mode, range, minimum, maximum, sum and count of a list of numbers.Mathematics & StatisticsNormal Distribution CalculatorP(X < x), P(X > x), P(a < X < b), outside a range, or the value for a probability, for any mean and σ.Mathematics & StatisticsPercentage CalculatorP% of a number, what % one value is of another, % change, increase/decrease, reverse % and % difference.Mathematics & StatisticsProbability CalculatorSingle-event probability, two independent events (and/or/neither), binomial distribution, combinations and permutations.Mathematics & StatisticsQuadratic Equation SolverRoots of ax² + bx + c = 0 (real or complex), discriminant, vertex, axis and factored form.Mathematics & StatisticsRatio & Proportion CalculatorSimplify a ratio A:B(:C), solve a proportion A:B = C:x, or share a total in a ratio.Mathematics & StatisticsScientific CalculatorEvaluate a typed expression: brackets, powers, roots, trig in degrees or radians, logs, e, π, factorial.Mathematics & StatisticsSimultaneous Equations SolverSolve 2×2 or 3×3 linear systems for x, y, z, or find out that there is no solution or infinitely many.Mathematics & StatisticsStandard Deviation & Variance CalculatorSample and population standard deviation, variance, coefficient of variation and standard error of a data list.Mathematics & StatisticsTrigonometry CalculatorSix trig functions of an angle, inverse sin/cos/tan with all solutions, and a right-triangle solver.Mathematics & StatisticsZ-Score Calculatorz = (x − μ) ÷ σ and back, with percentile, upper-tail and two-tailed probabilities.Mathematics & Statistics