Pythagorean Theorem Calculator

Calculate missing side of a right triangle using the Pythagorean theorem

Pythagorean Theorem

a² + b² = c²

Where c is the hypotenuse (longest side) and a, b are the other two sides

Enter Two Sides

Right Triangle

a = ab = bc = c

How to Use:

  • 1.Enter any two known sides of your right triangle
  • 2.The calculator automatically detects which side to solve for
  • 3.View the result with step-by-step solution and verification

Tip: The hypotenuse (c) is always the longest side of a right triangle, opposite the right angle.