Math
Pythagorean Theorem Calculator
Find the hypotenuse of a right triangle from its two shorter sides.
Formula
For a right triangle, a squared + b squared = c squared, where c is the hypotenuse.
How it works
Enter the two shorter sides. The calculator squares each, adds them, and takes the square root. Sides 3 and 4 give hypotenuse 5.
FAQs
What does the Pythagorean Theorem do?
It takes the values you enter and works out the pythagorean theorem for you, showing the result straight away.
What should I enter?
Enter ordinary numbers in the boxes above. If a value does not make sense for this calculation, the page will ask you to check it instead of showing a wrong answer.
Can I use the result for homework or everyday maths?
Yes. It is a general-purpose maths helper; for exam or professional work, still check the steps against your own working.