Free online calculator
Body Fat Percentage Calculator
Estimate your body fat percentage with the U.S. Navy circumference method using height, waist, neck, and hip measurements.
Health estimate
Body fat percentage
Enter valid measurements to see an estimate.
Uses the U.S. Navy circumference method. This is a general estimate, not medical advice.
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Why NerdCalc ↓Simple by design
Useful answers, minus the spreadsheet.
NerdCalc turns common calculations into clear decisions. Each tool shows the inputs that matter, explains the result, and keeps the math out of your way.
Use it on any device, with no account and no personal data required.
Common questions
A few things to know.
Is NerdCalc free?
Yes. All four calculators are free to use without an account.
Where are my recent results stored?
Only in your current browser on your device. Clear them at any time from the history panel.
Are these results professional advice?
No. Body-fat and investment results are estimates for general information. Consult a qualified professional before making medical or financial decisions.