Body Fat Calculator
Estimate body fat % (U.S. Navy method)
Estimate your body fat percentage with the U.S. Navy tape method — just a few measurements and no special equipment.
How to measure
Measure your neck and waist (at the navel), plus hips for women, with a flexible tape — relaxed, not sucking in. Accuracy depends on consistent measurements.
An estimate, not a clinical measurement (like a DEXA scan).
Frequently asked questions
What's a healthy body fat percentage?
Roughly 10–20% for men and 18–28% for women is typical for healthy adults, varying with age and fitness.
How accurate is the Navy method?
Within a few percent for most people when measured carefully — good for tracking trends over time.