Body Fat Calculator
cm
cm — measure just below the larynx
cm — at navel level
cm — at widest point (women only)
0.0%
Estimated Body Fat
Category—
Body Fat Mass—
Lean Body Mass—
MethodU.S. Navy Circumference
Get Your Results Emailed
Enter your email and we'll send you a summary of your calculator calculation. No spam, unsubscribe anytime.
How to Use
Select your gender, then enter your measurements. Measure your neck just below the larynx, your waist at navel level, and your hips at the widest point (women only). Use a flexible tape measure and keep it snug but not tight.
This calculator uses the U.S. Navy circumference method, with accuracy of about 3-4% compared to hydrostatic weighing.
Body Fat Categories
| Category | Men (% body fat) | Women (% body fat) |
|---|---|---|
| Essential Fat | 2-5% | 10-13% |
| Athletes | 6-13% | 14-20% |
| Fitness | 14-17% | 21-24% |
| Average | 18-24% | 25-31% |
| Obese | 25% + | 32% + |
Frequently Asked Questions
The U.S. Navy method has a margin of error of about 2-3% compared to hydrostatic weighing. It's more accurate than BMI for assessing body composition and is widely used by military and fitness professionals.
BMI uses only height and weight, so it can misclassify muscular people as overweight. Body fat percentage directly measures how much of your weight is fat vs. lean mass, giving a more accurate picture of your fitness level.