Pythagorean Theorem Calculator

Find missing sides of right triangles using a² + b² = c².

How It Works

  1. Choose what to find. Select Find c (hypotenuse), Find a, or Find b from the mode tabs.
  2. Enter two sides. Type the known leg or hypotenuse values in the quick calculator.
  3. Get the missing side. The calculator applies a² + b² = c² with step-by-step math.
  4. Complete triangle. Enter any 2 sides in the advanced section to solve all sides, angles, and area.
  5. Check triples. Verify if three integers form a Pythagorean triple (e.g. 3, 4, 5).

Also try our Fraction Calculator or Math Calculators.

Enter values to see results.

Formula & Reference

a² + b² = c²