Everyday utility

Pythagorean Theorem Calculator

Calculate the hypotenuse or a leg of a right triangle using a² + b² = c². Use this Data and utilities tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
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Result
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Common questions
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How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

The Pythagorean theorem: in a right triangle, c² = a² + b², where c is the hypotenuse (longest side) and a, b are the legs. Solve for any missing side when two are known.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

What is a Pythagorean triple?

A Pythagorean triple is a set of three positive integers satisfying a² + b² = c². Examples: (3, 4, 5), (5, 12, 13), (8, 15, 17).