Body Fat Calculator (US Navy Method)

Estimate your body fat percentage from a few tape measurements using the US Navy method — no special equipment needed. Switch between metric and imperial. Updates as you type.

Body fat categories (rough guide)

• Men: essential 2-5% · athletes 6-13% · fitness 14-17% · average 18-24% · high 25%+
• Women: essential 10-13% · athletes 14-20% · fitness 21-24% · average 25-31% · high 32%+

This is an educational estimate from the US Navy formula, not medical advice or a clinical measurement. Use it to track trends and talk to a professional about your health.

FAQ

How does the US Navy body fat method work?

It estimates body fat from tape measurements — neck and waist (plus hips for women) and height — using a validated formula. No special equipment, just a tape measure.

How accurate is it?

Usually within a few points of methods like DEXA — good for tracking change. It's an estimate, so watch the trend rather than one exact number.

How do I measure correctly?

Relaxed, no sucking in. Neck below the larynx; waist at the navel (men) or narrowest point (women); hips at the widest (women). Snug, level tape, same spots each time.

What is a healthy body fat percentage?

Roughly 14-24% (men) and 21-31% (women), athletes lower. Informational only, not medical advice.

More tools: BMI calculator, calorie calculator, and the full tools list.