Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy method — just a few tape measurements required.
Informational estimate only. Not medical advice. Accuracy varies ±3-4% vs. DEXA.
Frequently Asked Questions
How is this calculated?
Using the US Navy circumference equations — based on height, neck, and waist (plus hip for women). Accurate to ±3-4% vs. DEXA for most people.
How do I measure correctly?
Neck: just below the Adam's apple. Waist: at the navel (men) or narrowest point (women). Hip (women): at the widest point. Tape snug but not compressing skin.
What's a healthy body fat range?
ACE rough categories — Men: essential 2-5%, athlete 6-13%, fit 14-17%, acceptable 18-24%, obese 25%+. Women: essential 10-13%, athlete 14-20%, fit 21-24%, acceptable 25-31%, obese 32%+.
Is this medical advice?
No. This tool is for informational purposes only and is not a substitute for advice from a registered dietitian or physician.