Pythagorean Theorem Calculator
Any two sides give the third — plus a right-triangle check when all three are entered.
Hypotenuse c
5
- Area
- 6
- Perimeter
- 12
How the Pythagorean Theorem Calculator works
The calculation follows the standard method used across the US — no shortcuts, no hidden assumptions. Here is exactly what happens behind the scenes:
Frequently Asked Questions
How does the Pythagorean Theorem Calculator work?
Enter your numbers above and results update instantly using standard formulas, computed entirely on your device.
Is the Pythagorean Theorem Calculator free to use?
Yes — completely free with no signup required, and it works on phones, tablets, and desktops.