Calculators
Math & Statistics
Percentages, fractions, geometry, algebra and statistics. · 23 tools
From homework to spreadsheets: percentages and percentage change, fractions and ratios, powers, roots and logarithms, quadratic equations, geometry, averages and standard deviation. Each calculator shows the steps, not just the answer, so it doubles as a worked example.
Area CalculatorRectangle, triangle or circle area.Circle CalculatorCalculate a circle's area, circumference and diameter from its radius.Exponent CalculatorCalculate a base number raised to a chosen power, plus its square and cube.Fraction CalculatorAdd, subtract, multiply, divide fractions. Step-by-step solution.LCM & GCF CalculatorLeast common multiple and greatest common factor. Prime factorization.Logarithm Calculatorlog₁₀, ln, log₂ or custom base. Also antilogarithm.Long Division Calculator with StepsFree long division calculator: divide two whole numbers and see the quotient, remainder, dPercent Change CalculatorFree percent change calculator: enter old and new values to get the percent increase or dePercentage CalculatorPopularPercentage of a number, percentage change, increase and decrease.Percentage Point CalculatorCalculate the difference between two percentages in percentage points and the relative …Probability CalculatorPermutations P(n,r) and combinations C(n,r) with formulas.Pythagorean TheoremFind any side of a right triangle: a² + b² = c².Quadratic FormulaSolve ax²+bx+c=0. Discriminant, roots and vertex.Ratio CalculatorSimplify, scale and convert ratios to percentages.Root CalculatorSquare root, cube root, nth root. Simplified radical form.Rounding CalculatorRound any number to the nearest million, thousand, hundred, ten, whole number, tenth, hundScientific Calculatorsin, cos, tan, log, ln, sqrt, powers. Degrees and radians. History.Sig Fig CalculatorCount significant figures in any number with a digit-by-digit rule explanation, or round tSlope CalculatorFree slope calculator: enter two points to get the slope as a fraction and decimal, the liStatistics CalculatorMean, median, mode, variance and standard deviation.Triangle Area CalculatorCalculate a triangle's area and perimeter from its three side lengths using Heron's for…Volume CalculatorCalculate the volume of a box or cylinder in cubic metres and litres.Z-Score Calculator with PercentileFree z-score calculator: enter a value, mean, and standard deviation to get the z-score an