Math Calculators

Free statistics calculator. Enter a list of numbers to get the mean, variance, standard deviation, minimum, maximum and range in one step.

Free square root calculator. Find the square root, cube root or any nth root of a number, with odd roots of negative numbers and 6-decimal answers.

Free online scientific calculator with sin, cos, tan, log, ln, powers, roots and factorials, in degrees or radians, with the correct order of operations.

Free ratio calculator. Solve the missing number in a proportion A : B = C : D, for recipes, scaling, map distances and screen sizes.

Free probability calculator. Find the chance that two events both happen, or that either happens, for independent or mutually exclusive events.

Free percentage calculator. Find X% of a number, what percent one number is of another, and the percentage increase or decrease between two values.

Free geometry calculator. Find the area and perimeter of a circle, rectangle or right triangle, with the hypotenuse of the triangle shown too.

Free fraction calculator. Add, subtract, multiply and divide fractions, with the answer simplified and shown as a decimal and a mixed number.

Free exponent calculator. Raise any number to any power, including negative and fractional powers, with exact digits for big whole numbers.

Free decimal calculator. Add, subtract, multiply or divide decimals and round the answer to 0 to 10 decimal places, with the exact value shown.

Free average calculator. Enter a list of numbers to get the mean, median, mode, sum, count, smallest and largest values at once.

Free square footage calculator. Find the area of a room or lot in sq ft, sq yards, sq meters and acres, for rectangles, triangles, circles and L-shaped spaces.