Body Fat Calculator
Estimate your body fat percentage with the US Navy tape method and the BMI method — no signup, instant results.
US Navy Method
BMI Method Estimate
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Less precise, for comparison
Categories — Men: Essential 2–5%, Athletes 6–13%, Fitness 14–17%, Average 18–24%, Obese 25%+. Women: Essential 10–13%, Athletes 14–20%, Fitness 21–24%, Average 25–31%, Obese 32%+. This is an estimate for information only — not medical advice.
How to use
- Measure neck just below the voice box, waist at the navel, and hip (women) at the widest point — all in cm.
- Enter your details; results update instantly.
- Compare the Navy result with the BMI estimate and check your category.
Frequently Asked Questions (FAQ)
What does the body fat calculator do?
It estimates your body fat percentage using the US Navy tape method and the BMI method.
What measurements do I need?
Height, weight, neck, waist, and hip measurements.
Why does it show two results?
It estimates with both the US Navy tape method and the BMI method, so you can compare the two figures.
Do men need the hip measurement too?
No. The hip field is only for women; the Navy formula uses neck and waist for men.