Body fat percentage calculator
To calculate body fat percentage with a tape measure, the U.S. Navy formula uses height, neck and waist (plus hip for women): a man 1.78 m tall with a 38 cm neck and an 88 cm waist has 18.7% body fat. Without a tape, the Deurenberg formula estimates it from BMI and age.
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Method
Your details
Sex
Tape measurements (cm)
Accepts 88.5 or 88,5.
Choose the method and enter age, weight and height to see your body fat percentage.
Formula-based estimate, not a diagnosis. To assess body composition, see a dietitian or doctor; bioimpedance and DEXA measure differently and may give different numbers.
Ideal body fat percentage by age and sex
Ranges from Gallagher et al. (2000) for adults, linked to the WHO BMI cutoffs. The upper limit of each range already belongs to the next one, and the paper calls the ranges provisional.
| Sex and age | Below healthy | Healthy | Overweight | Obesity |
|---|---|---|---|---|
| Female, 20–39 | < 21% | 21–33% | 33–39% | ≥ 39% |
| Female, 40–59 | < 23% | 23–34% | 34–40% | ≥ 40% |
| Female, 60–79 | < 24% | 24–36% | 36–42% | ≥ 42% |
| Male, 20–39 | < 8% | 8–20% | 20–25% | ≥ 25% |
| Male, 40–59 | < 11% | 11–22% | 22–28% | ≥ 28% |
| Male, 60–79 | < 13% | 13–25% | 25–30% | ≥ 30% |
ACE classification (American Council on Exercise)
The scale most calculators use. It does not change with age.
| Category | Female | Male |
|---|---|---|
| Essential fat | 10–13% | 2–5% |
| Athletes | 14–20% | 6–13% |
| Fitness | 21–24% | 14–17% |
| Acceptable | 25–31% | 18–24% |
| Obesity | 32% or more | 25% or more |