Calculators
Math, percentages, geometry and statistics.
24 tools
100% localAngle converterDegrees, radians, gradians and full turns.Open100% localPercentage calculatorEvery percentage question in one place: share, total, change and increase.Open100% localMean, median and standard deviationPaste a series of numbers and get every statistic at once.Open100% localWeighted averageAverage values that carry different weights โ grades, ratings, coefficients.Open100% localFraction calculatorAdd, subtract, multiply or divide two fractions, simplified automatically.Open100% localGCD and LCMGreatest common divisor, least common multiple and prime factorisation.Open100% localQuadratic equationSolve axยฒ + bx + c = 0: discriminant, roots and vertex of the parabola.Open100% localTriangle calculatorPythagoras, area, perimeter and angles from three sides or two sides of a right triangle.Open100% localCircle calculatorRadius, diameter, circumference and area โ give one, get the rest.Open100% localVolume and surface of a solidCube, box, cylinder, sphere, cone and pyramid: volume, surface and capacity in litres.Open100% localCombinations and permutationsHow many draws, arrangements or orderings are possible? With or without repetition.Open100% localRatio & proportion calculatorSolve a cross-multiplication, simplify a ratio or split a total.Open100% localPower, root and logarithmRaise to a power, take an nth root or compute a logarithm.Open100% localNumber base converterBinary, octal, decimal, hexadecimal and any base from 2 to 36.Open100% localScale calculatorConvert between drawing distance and real distance (models, maps, blueprints).Open100% localProbability calculatorProbability of an event, of repeating it, and the expected count over several tries.Open100% localRound a numberRound, truncate, floor, ceiling and round to the nearest multiple.Open100% localScientific calculatorA full expression with brackets, trigonometric functions, logarithms and constants.Open100% localSystem of linear equationsSolves a system of two or three unknowns, and says plainly when there is no single solution.Open100% localPrimes and factorsIs a number prime? If not, its prime factorisation and the list of its divisors.Open100% localLinear regressionThe line that best fits your points, its equation, how good the fit is and a prediction.Open100% localComplex numbersSum, product, quotient, modulus and argument of two complex numbers, in both algebraic and polar form.Open100% localSignificant figures and scientific notationRound to a number of significant figures, and switch between decimal, scientific and engineering notation.Open100% localArithmetic, geometric and harmonic meansThe three means of a series, and which to pick: geometric for rates, harmonic for speeds.Open