15 calculators

Math Calculators

By Tahir Zaman·Reviewed by the Calculate All Editorial Team·Published 2026-10-05·Updated 2026-10-05

Everyday math, solved instantly

Free math calculators that run entirely in your browser. Pick a tool below — every formula is shown.

Your exact age in years, months, and days — down to the day.

Find the average (mean) of any list of numbers instantly.

Add, subtract, multiply, and divide — a fast basic calculator for everyday math.

See the sale price and exactly how much you save.

Add, subtract, multiply, and divide fractions with automatic simplification.

Find the greatest common factor of two numbers instantly.

Find the least common multiple of two numbers in one click.

Get the mean, median, and mode of any dataset in one go.

Find X% of Y, what percent one number is of another, and percent change.

Check whether any number is prime and find its smallest factor.

Solve ax² + bx + c = 0 and see the roots and discriminant.

Reduce any ratio to its simplest form, like 12:18 → 2:3.

A full scientific calculator with trig, logs, and powers — right in your browser.

Measure how spread out your numbers are — with the mean included.

Calculate tips and split the bill fairly among friends.