Pythagorean Theorem Calculator

Choose a mode and enter the known sides to solve for the missing length.

Pythagorean Theorem Calculator
a = ?b = ?c = ?

How the Pythagorean theorem works

For a right triangle, the squares of the two legs add up to the square of the hypotenuse.

Use c = √(a² + b²) to find the hypotenuse or b = √(c² - a²) to find a missing leg.

Pythagorean Theorem FAQs