Pythagorean Theorem Calculator

1. Solve For: Select "Hypotenuse" or "Leg".
2. Input Sides: Enter the lengths of the two known sides.
3. Calculate: Find the length of the missing side.

The Pythagorean Theorem Calculator is the most famous tool in geometry. It solves for the missing side of a right triangle using the formula a² + b² = c².

Whether you need to find the hypotenuse (c) or one of the legs (a or b), this calculator does the squaring and square-rooting for you.