Body Fat Calculator
Calculator ToolsBody fat % using the US Navy method
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History
All history →Body Fat Calculator — at a glance
Estimate your body fat percentage at home with just a tape measure.
Height 172 cm
Waist 84 cm
Run
Body fat 17.4%
How to use it — step by step
Sex, weight, height and neck, waist (and hip for women) measurements in cm.
1
Enter your values
Fill in the boxes. Sensible example values are already filled in for you.
2
Calculate Body Fat
Press the button. The answer is worked out instantly on your device.
3
Read or copy the result
See the big answer and the extra details, then press Copy to keep them.
Pro tips
Small things that make the result better.
✦Measure the waist at the navel for men, at the narrowest point for women.
✦Take each measurement twice and use the average.
✦Use the trend over weeks, not a single reading.
Quick facts
US Navytape method
±3–4%typical accuracy
Fat & leanmass shown
Freeno signup
Frequently Asked Questions
How accurate is it?+
It is a reasonable estimate, but DEXA scans or skinfold tests by a professional are more accurate.
Do women need the hip value?+
Yes. The female formula uses waist, hip and neck. Men can leave the hip box as it is.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
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