Pythagorean theorem calculator

Find the missing side of a right triangle with a² + b² = c², plus the angles, area and perimeter.

Free · No sign-up · Your files are processed on your device and never uploaded

How to use Pythagorean theorem calculator

  1. Fill in a few fields…
    1

    Paste or type

    Put your content in the box - or try the example.

  2. Result appears instantly
    2

    Watch the result

    Pick the options you want - the defaults suit most files.

  3. TXTCopy the result
    3

    Download the result

    Ready in seconds. Your file never left your device.

Features

  • Answer updates as you type.
  • Clear breakdown you can copy.
  • Works on phone and desktop.

Free and private

The calculation runs in your browser. Nothing you type is sent or stored, and there is no limit.

Questions

Which side is c?

The hypotenuse - the longest side, opposite the right angle.

Is it free?

Yes - free and unlimited, with no sign-up and no watermark.

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