Pythagorean Theorem Calculator
Fill in the values and the answer updates as you type.
How the Pythagorean Theorem Calculator works
c = √(a² + b²). Area = a × b ÷ 2.
Inputs and results
The Pythagorean Theorem Calculator takes 2 inputs and gives 2 results.
What you enter
- Side a — starts at 3.
- Side b — starts at 4.
What you get
- Hypotenuse
- Area
Example: Pythagorean Theorem Calculator with the starting values
With side a 3 and side b 4, the calculator returns:
| Hypotenuse | 5 |
|---|---|
| Area | 6 |
Change any value above and the results update straight away.
Pythagorean Theorem Calculator FAQ
How do I use the Pythagorean Theorem Calculator?
Enter side a and side b in the fields, then read hypotenuse and area in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Pythagorean Theorem Calculator calculate?
Hypotenuse and area of a right triangle. It returns hypotenuse and area from the 2 values you provide.
What values does the Pythagorean Theorem Calculator start with?
It opens with side a 3 and side b 4 so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Pythagorean Theorem Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Pythagorean Theorem Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.