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Pythagorean Calculator

Find a right triangle’s hypotenuse and area.

● Live results · Runs on your device · No sign-up

Your inputs

Hypotenuse = √(a² + b²). Use the same length unit.

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UNDERSTAND YOUR RESULTS

Pythagorean Calculator guide

Find a right triangle’s hypotenuse and area.

How to use this tool

Enter Leg a, Leg b.
Change a value to update the results and illustration. Check any validation message before using the output.
Copy the results or download CSV. Reset restores the example values.

A worked example

Perpendicular legs 3 and 4 give a hypotenuse of 5 and area of 6.

How it works

Hypotenuse = √(a² + b²). Use the same length unit.

Frequently asked questions

How should I interpret the illustration?

It is a visual aid, not a replacement for the numeric output. Some charts compare values with different units, and those magnitudes are not directly comparable.

Can I use the result without checking the inputs?

Check units, signs, assumptions and rounding first. The tool cannot know whether the values you enter describe the real situation correctly.