Pythagorean Theorem Calculator
Find the missing side of a right triangle using a² + b² = c². Leave the unknown side empty.
About the Pythagorean Theorem Calculator
In a right-angled triangle the square of the hypotenuse equals the sum of the squares of the other two sides: a² + b² = c². Enter any two sides to find the third — useful for construction, ladders, screen sizes and homework.
How to use the Pythagorean Theorem Calculator — step-by-step guide
Frequently asked questions
Is the Pythagorean Theorem Calculator free?
Yes. The Pythagorean Theorem Calculator on Apex Tool Station is 100% free with no signup and no watermark. Browser tools have no usage limits.
Are my files or data uploaded to a server?
No. Everything runs locally in your browser using JavaScript. Your files and text never leave your device, which makes it safe for private documents.
Does it work on mobile?
Yes. The tool works on any modern browser on Android, iPhone, Windows, Mac and Linux.