Hypotenuse Calculator
Calculate the hypotenuse of a right triangle from its two legs using the Pythagorean theorem.
Formula: c = √(a² + b²)
About Hypotenuse Calculator
Hypotenuse Calculator is a free online calculator that gives you an instant, accurate result as you type. Calculate the hypotenuse of a right triangle from its two legs using the Pythagorean theorem.
The calculation uses the standard formula c = √(a² + b²) and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
The 3-4-5 triangle is the smallest right triangle with whole-number sides, used since ancient Egypt to lay out square corners.
Frequently Asked Questions
Is Hypotenuse Calculator free to use?
Yes. Hypotenuse Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (c = √(a² + b²)) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
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