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Body Fat Calculator

Estimate your body fat percentage using the US Navy circumference method with metric or imperial measurements.

Estimate your body fat percentage using the US Navy method, based on a few simple body measurements.

How to use it

  1. 1Select your sex and unit system.
  2. 2Enter your height, neck and waist (and hip, for women).
  3. 3View your estimated body fat percentage and category.

Your measurements

Enter your measurements to estimate body fat percentage.

Units
Sex
cm
cm
cm

Not medical advice

This is an estimate only and doesn't replace clinical body composition testing.

Result

Estimated body fat

16.9%

Category
Fitness

Estimated with the US Navy circumference method.

Frequently asked questions

How accurate is the Navy method?
It's a reasonable estimate for most people (typically within a few percentage points) but is less precise than DEXA scans or calipers.
Where do I measure my waist?
At the narrowest point for men, or at the widest point around the navel for women, following standard Navy method guidance.
Is this medical advice?
No, this tool provides an estimate only and is not a substitute for professional medical assessment.

Something wrong with this tool or its numbers?

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