Pythagorean Theorem Calculator

Find the missing side of a right triangle: enter any two of a, b and hypotenuse c.

How to use the Pythagorean Theorem Calculator

Fill in what you know of: Leg a, Leg b, Hypotenuse c — leave the unknown empty.
The results (a, b, c, Area, Angle opposite a) are calculated instantly as you type.
Use “Copy link” to share the calculation with the same input values.

Formula

a² + b² = c²