Pythagorean Theorem Calculator
Enter two sides of a right triangle to find the hypotenuse using a² + b² = c². Essential for construction, navigation, and geometry problems.
Hypotenuse
Enter values to calculate
How to Use the Pythagorean Theorem Calculator
1
Enter the length of side A.
2
Enter the length of side B.
3
The hypotenuse (side C) is calculated automatically.
Frequently Asked Questions
What is the Pythagorean theorem?
It states that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides: a² + b² = c².
Can I find a leg instead of the hypotenuse?
Yes — rearrange to a = √(c² - b²). This tool calculates the hypotenuse from two legs.
Does it work for non-right triangles?
No — the Pythagorean theorem only applies to right triangles (those with a 90° angle).