Math & Numbers
13 free tools
From quick arithmetic to the steps that are easy to get wrong by hand — averages, ratios, fractions, standard deviation, quadratic equations, prime factorization, and geometry. Each calculator shows its working, so they’re just as useful for checking homework or following the method as for getting the final answer.
- Percentage Calculator Popular Every common percentage question, solved.
- Area Calculator Area of any common shape.
- Volume Calculator Volume of any common solid.
- Pythagorean Theorem Calculator Solve a right triangle (a² + b² = c²).
- Average Calculator Mean, median, mode and more.
- Ratio Calculator Simplify ratios, solve proportions.
- Circle Calculator Any circle measurement from one value.
- Slope Calculator Slope and line equation from two points.
- Quadratic Formula Calculator Solve ax² + bx + c = 0 instantly.
- Standard Deviation Calculator Standard deviation, variance, and mean.
- Fraction Calculator Calculate with fractions, fully simplified.
- GCD & LCM Calculator GCD and LCM of any number set.
- Prime Factorization Calculator Factor any number into primes.