Pythagorean Theorem Calculator
Find the length of the hypotenuse or a missing leg of a right triangle instantly.
Pythagorean Theorem Calculator
Calculated Result
The Theorem
What is the Pythagorean Theorem?
The Pythagorean Theorem states that in a right-angled triangle, the square of the hypotenuse ($c$) is equal to the sum of the squares of the other two sides ($a$ and $b$).
Formula
a² + b² = c²
How to use this tool:
- Enter any two known sides.
- Leave the unknown side blank.
- Click Calculate to find the missing side and see the step-by-step working.