Math Calculators — Free Online Tools
Percentage, fraction, average, scientific, area, volume, and equation solvers. From everyday percentage problems to scientific notation and quadratic equations, our math calculators deliver precise step-by-step answers.
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Percentage Calculator
Free percentage calculator for all common percentage problems: what percent of X is Y, X percent of Y, and percentage change between two numbers.
OpenFraction Calculator
Free fraction calculator to add, subtract, multiply, divide, simplify, and convert fractions with proper step-by-step results shown instantly.
OpenAverage Calculator
Free average calculator. Enter any number of values to instantly compute the mean, median, and mode of your data set.
OpenScientific Calculator
Free online scientific calculator with trigonometric, logarithmic, exponential, and power functions. Perfect for students and engineers — works in your browser.
OpenQuadratic Equation Solver
Free quadratic equation solver for ax² + bx + c = 0. Enter coefficients to find real or complex roots with the quadratic formula, instantly.
OpenRatio Calculator
Free ratio calculator to simplify ratios, find missing values in equivalent ratios, and compare two ratios directly.
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Area Calculator
Free area calculator for squares, rectangles, triangles, circles, parallelograms, trapezoids, and more. Get area in any unit instantly.
OpenVolume Calculator
Free volume calculator for cubes, boxes, cylinders, spheres, cones, and more. Calculate capacity in liters, gallons, and cubic units instantly.
OpenPythagorean Theorem Calculator
Free Pythagorean theorem calculator. Enter two sides of a right triangle to find the missing side with a² + b² = c² instantly.
OpenPrime Number Checker
Free prime number checker. Enter any integer to instantly determine whether it is prime and see its prime factors.
OpenLCM & GCD Calculator
Free LCM and GCD calculator. Enter two or more numbers to find their least common multiple and greatest common divisor instantly.
OpenStatistics Calculator
Free statistics calculator that computes mean, median, mode, range, variance, and standard deviation for any list of numbers.
OpenAbout Math Calculators
Math powers everything from splitting a restaurant bill to engineering a bridge. Our 12 free math calculators cover the formulas you reach for most: percentages, fractions, averages, ratios, areas, volumes, the Pythagorean theorem, prime checks, LCM/GCD, statistics, and full scientific notation.
Each tool shows the result and, where useful, the underlying formula and a worked example so you understand the method — not just the answer. That makes them ideal for students, teachers, and anyone who wants to double-check their work without firing up a spreadsheet.
The quadratic equation solver handles real and complex roots, the statistics calculator returns mean, median, mode, and standard deviation, and the scientific calculator respects standard order of operations. All calculations run instantly in your browser with no sign-up.