Body Fat Calculator
Enter your age, sex, height and weight, and choose a method. The BMI method needs no tape measure. The US Navy method uses your waist, neck and, for women, hip measurements.
Estimated body fat
19.8%
Average
- Fat mass
- 13.8 kg
- Lean mass
- 56.2 kg
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Commonly used ranges (men)
| Category | Body fat |
|---|---|
| Essential fat | 2% to 6% |
| Athletes | 6% to 14% |
| Fitness | 14% to 18% |
| Average | 18% to 25% |
| Above average | 25% and above |
- Both methods are estimates and can be several percentage points off. Body composition scans give better numbers. An estimate from a published formula, not a medical assessment. For health decisions, talk to a doctor or a qualified professional.
Two ways to estimate body fat
The BMI-based method (Deurenberg) estimates body fat from BMI, age and sex. It is quick but cannot tell muscle from fat.
The US Navy method uses tape measurements. Measure the waist at the navel, the neck below the larynx and, for women, the widest part of the hips, with the tape snug but not tight.
Both are estimates and can be several percentage points off. A body composition scan is more precise. For health questions, talk to a doctor.
The formula
US Navy (men): 495 ÷ (1.0324 − 0.19077 × log10(waist − neck) + 0.15456 × log10(height)) − 450. BMI method: 1.20 × BMI + 0.23 × age − 16.2 (men) or − 5.4 (women).
Common questions
How do I calculate body fat percentage?
Use a formula such as the US Navy method with tape measurements, or estimate from BMI. A scan such as DEXA gives a more exact figure.
Which method is more accurate?
The tape-measure method usually reflects your build better than the BMI method, but both are estimates.
What is a healthy body fat percentage?
Ranges vary by age and sex, and the ranges shown are commonly used guides. Ask a doctor what is right for you.
Is this medical advice?
No. It is an estimate from published formulas.
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