Body Fat Calculator
Estimate your body composition using the U.S. Navy method. Unlike BMI which only uses weight and height, the body fat calculator uses circumference measurements — neck, waist, and hips — for a more body-composition-aware estimate that better distinguishes fat from muscle.
Body Fat
0%
0 kg
Fat Mass
0 kg
Lean Body Mass
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How to Use the Body Fat Calculator
- Select your gender and enter your height.
- Measure and enter neck, waist, and (for females) hip in cm with a flexible tape.
- Click Calculate to see body fat % based on the Navy method.
Formula Used
Female: 495 / (1.29579 − 0.35004·log₁₀(Waist+Hip−Neck) + 0.22100·log₁₀(Height)) − 450
Typical range: Essential fat for men 2-5%, for women 10-13%. Athletic: men 6-13%, women 14-20%. Average: above those but below 25% (men) / 32% (women).
Frequently asked questions
Everything you need to know about this calculator.
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