Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method with neck, waist, and hip measurements.
Ad Space (728x90 Leaderboard)
U.S. Navy Formula (Men)
BF% = 86.010 × log10(waist - neck) - 70.041 × log10(height) + 36.76
Women: BF% = 163.205 × log10(waist + hip - neck) - 97.684 × log10(height) - 78.387
Enter Your Details
—
Body Fat %
—
Category
—
Lean Mass %
Ad Space (In-Article Responsive)
How This Calculator Works
Uses the U.S. Navy circumference method developed by Hodgdon and Beckett. Validated against DEXA scans with accuracy of ±3-4%.
Body Fat Categories
Essential: Men 2-5%, Women 10-13%. Athletes: Men 6-13%, Women 14-20%. Fitness: Men 14-17%, Women 21-24%. Average: Men 18-24%, Women 25-31%.
Frequently Asked Questions
How accurate is this?
Within 3-4% of DEXA scans for most people.
Where to measure waist?
At the navel level, narrowest point.
Explore More Tools
Try BMI Calculator for overall assessment. Ideal Weight for target range.
Related Calculators
Ad Space (728x90)