Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy method (tape measurements) and the BMI method. Get your fat mass, lean mass, and fitness category.
Body Fat Results
Fill in your measurements and click Calculate.
Body Fat Percentage Categories
Men
| Category | Body Fat % |
|---|---|
| Essential Fat | 2–5% |
| Athletes | 6–13% |
| Fitness | 14–17% |
| Average | 18–24% |
| Obese | 25%+ |
Women
| Category | Body Fat % |
|---|---|
| Essential Fat | 10–13% |
| Athletes | 14–20% |
| Fitness | 21–24% |
| Average | 25–31% |
| Obese | 32%+ |
Frequently Asked Questions
The US Navy formula has a margin of error of ±3–4% compared to DEXA scanning. It is one of the most accurate field methods available without equipment. Accuracy depends on careful tape measurement — measure at the same time of day, without clothes pulling the tape, and take 3 readings to average.
For men, 14–17% is generally considered fit, and 18–24% is healthy average. For women, 21–24% is fit and 25–31% is average. Essential fat (the minimum for organ function) is 2–5% for men and 10–13% for women. Going below essential fat is dangerous.
BMI doesn't distinguish between fat mass and lean mass. A muscular athlete can have a "obese" BMI while having low body fat. Conversely, a "normal" BMI person can have high body fat (skinny-fat). Body fat percentage directly measures body composition and is a better indicator of health risk and fitness.
