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Pythagorean Theorem Calculator

Enter two side lengths to calculate the hypotenuse or missing leg.

c = 5Leave exactly one field blank

How to use this Pythagorean Theorem Calculator

Solve a right triangle using the Pythagorean theorem. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.