Pythagorean Theorem Definition The Pythagorean Theorem Calculator will instantly solve the Pythagorean equation. The Pythagorean Theorem states that a²+b²=c² and can be used to find the length of the hypotenuse of a right triangle. Simply input the length of sides A and sides B and our calculator will calculate the length of side C according to the Pythagorean Theorem. If you just wish to calculate the length of the hypotenuse, then try our hypotenuse calculator.

How to Calculate Pythagorean Theorem Let's be honest - sometimes the best pythagorean theorem calculator is the one that is easy to use and doesn't require us to even know what the pythagorean theorem formula is in the first place! But if you want to know the exact formula for calculating pythagorean theorem then please check out the "Formula" box above.