Mathematics
Mathematics tools
12 free tools. No sign-up, no server, works offline.
Percentage CalculatorCalculate percentages, percentage change, and reverse percentages in both directions.Quadratic Equation SolverSolve ax² + bx + c = 0, including complex roots, vertex, and discriminant.Statistics Calculator (Mean, Median, Mode, SD)Compute mean, median, mode, standard deviation, variance, and quartiles from a dataset.Fraction CalculatorAdd, subtract, multiply and divide fractions, simplify them, and convert to and from decimals.Ratio CalculatorSimplify ratios, solve for a missing term, and scale a ratio to a total.Average Calculator (Mean, Median, Mode)Calculate mean, median, mode, range and weighted average from a list of numbers.Prime Factorisation CalculatorBreak a number into prime factors, list all divisors, and test whether it is prime.LCM & GCD CalculatorFind the least common multiple and greatest common divisor of any list of numbers.Area & Volume CalculatorArea, perimeter, surface area and volume for common 2D and 3D shapes.Roman Numeral ConverterConvert numbers to Roman numerals and back, with the rules explained.Number Base ConverterConvert between binary, octal, decimal, hexadecimal and any base from 2 to 36.Scientific CalculatorA full scientific calculator with trigonometry, logarithms, powers, roots and constants.