About the Body Fat Calculator
Your body fat percentage says more about your health and fitness than weight alone. This calculator uses the US Navy circumference method, which needs only a tape measure: your height, neck and waist (plus hips for women).
You will see your estimated body fat percentage, how much of your weight is fat and lean mass, and which fitness category you fall into. Results are estimates for general information and are not a substitute for advice from a doctor or other qualified health professional.
How to use the Body Fat Calculator
- Choose your sex and units.
- Measure your neck just below the larynx and your waist at the navel (women: also hips at the widest point).
- Enter your height, weight and measurements to see your result.
Frequently asked questions
How accurate is the US Navy method?
It is usually within about 3–4 percentage points of laboratory methods such as DEXA, which makes it a good, free way to track changes over time.
What is a healthy body fat percentage?
According to the American Council on Exercise, average ranges are about 18–24% for men and 25–31% for women. Athletes are typically 6–13% (men) and 14–20% (women).
How should I measure?
Measure on bare skin, keep the tape level and snug without compressing the skin, and take each measurement two or three times to get an average.