Math calculators

Percentages, fractions, averages, geometry and other everyday math.

Basic Math

Percentages, grade averages and other everyday arithmetic.

Percentage CalculatorPercent of a number, what percent one number is of another, percentage change, and adding or removing a percentage.Open GPA CalculatorGrade point average from letter grades and credits on the 4.0 scale, with an optional cumulative GPA.Open

Algebra

Solving equations step by step.

Equation SolverSolve linear and quadratic equations and pairs of linear equations exactly, with square roots, complex roots and the working.Open

Geometry

Areas and volumes of common shapes.

Area CalculatorArea and perimeter of rectangles, triangles, circles, ellipses, trapezoids and more, in any unit, with conversions.Open Volume CalculatorVolume and surface area of cubes, boxes, cylinders, spheres, cones, pyramids and prisms, in litres, gallons and more.Open

Statistics

Averages, spread and probability.

Average CalculatorMean, median, mode, range and standard deviation of a list of numbers, with the list sorted.Open Probability CalculatorThe probability and odds of an event, of two independent events together, or of successes over repeated tries.Open

Advanced Math

Scientific functions beyond basic arithmetic.

Scientific CalculatorAn online scientific calculator with trigonometry in degrees or radians, powers, roots, logarithms and factorials.Open

Fractions & Ratios

Working with fractions, ratios and proportions.

Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers exactly, simplify a fraction, or turn a decimal into one.Open Ratio CalculatorSimplify a ratio, solve a proportion such as 3 : 4 = 9 : ?, or divide a total in a ratio, exactly.Open