Geometry & Measurement Calculators
Right Triangle Calculator
Solve every side, angle, area and perimeter of a right triangle from any two sides.
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What is Right Triangle?
A right triangle has one 90° angle. Given any two sides, trigonometry (SOH-CAH-TOA) and the Pythagorean theorem determine all its remaining values.
How it works
We solve the missing side with a² + b² = c², then derive the acute angles with inverse tangent, and finally compute area and perimeter.
- 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.