Geometry & Measurement Calculators
Pythagorean Theorem Calculator
Solve any missing side of a right triangle with a² + b² = c².
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What is Pythagorean?
The Pythagorean theorem states that in a right triangle the square of the hypotenuse equals the sum of the squares of the other two sides: a² + b² = c².
How it works
We solve algebraically for whichever side you left blank, reject negative or impossible inputs, and confirm the result satisfies the theorem.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.