Pythagorean Theorem Calculator Guide
Use this calculator to find the missing side of a right triangle.
Important Note
Make sure the values you enter describe a right triangle.
Back to Math Calculators
Pythagorean Theorem Calculator
Pythagorean theorem calculator for solving triangle side lengths and the hypotenuse.
Geometry
Fast Calculation
SEO Ready
Pythagorean Theorem Calculator
Enter two known sides to calculate the missing side of a right triangle.
Result
0
Ready to calculate
Working
Formula
a² + b² = c², where c is the hypotenuse of a right triangle.
Use Case
Useful for geometry, construction, and right-triangle problems.
Tip
Enter the hypotenuse field only when you want to solve for a missing leg.
How this calculator is prepared
Method
The formula and result panel are kept visible so students can compare the input, operation, and output.
Updated
Last reviewed on April 20, 2026 for page text, labels, and calculator behavior.
Use
Use the result for study checks, then apply your course or exam rounding rule before final submission.