Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy circumference method. This method uses measurements of your neck, waist, and height (and hips for women).
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method
About Body Fat Percentage
Body fat percentage is the total mass of fat divided by total body mass. It includes essential fat (necessary for basic health) and storage fat.
The U.S. Navy Method
This calculator uses the U.S. Navy circumference method, which measures specific body parts to estimate body fat. While not as accurate as methods like DEXA scans or hydrostatic weighing, it provides a reasonable estimate when performed correctly.
How to Take Measurements
Neck: Measure just below the larynx (Adam's apple) with the tape sloping downward.
Waist: Measure at the narrowest point, usually just above the belly button.
Hips (women only): Measure at the widest point around the buttocks.
For best results, use a flexible tape measure and take measurements in the morning.
Understanding Your Results
Body fat percentage varies by age, gender, and fitness level. While there's no perfect percentage, here are some general categories:
Men
- Essential fat: 2-5%
- Athletes: 6-13%
- Fitness: 14-17%
- Average: 18-24%
- Obese: 25% and higher
Women
- Essential fat: 10-13%
- Athletes: 14-20%
- Fitness: 21-24%
- Average: 25-31%
- Obese: 32% and higher