Body Fat Calculator
Estimate body fat from measurements.
Private by design — everything is calculated on your device, nothing is storedTry: Sex=male, Waist=85, Neck=38, Height=175, Hip (female)=95 → male, 16.9 %, Fit
How to use
The U.S. Navy method estimates body fat from circumference measurements using logarithmic formulas. It is a field estimate, not a DEXA scan.
Formula (male)
BF% = 495 / (1.0324 − 0.19077·log(waist−neck) + 0.15456·log(height)) − 450
Female adds hip to the log term.
FAQ
How accurate is it?
Within a few percent for most people; hydration and flesh distribution affect it.
Do I need hip for men?
No — the male formula uses waist, neck and height only.
Better than BMI?
Often yes, because it distinguishes muscle from fat.
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