Body fat calculator

Estimate your body fat percentage from height, neck, waist (and hips for women) with the US Navy method - just a measuring tape.

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

How to use Body fat 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.

How to use it

Fill in the fields - the answer updates as you type. Estimate your body fat percentage from height, neck, waist (and hips for women) with the US Navy method - just a measuring tape.

Free and private

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

Questions

How accurate is it?

Usually within 3-4% of a lab DEXA scan when measured carefully.

Is it free?

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

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