Health & Fitness
Body Fat Calculator
Estimate your body fat percentage from BMI, age and sex.
Body Fat Calculator
Body fat
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BMI—
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Estimates only, using the BMI-based Deurenberg formula. Not medical advice.
How body fat is estimated
This tool uses the Deurenberg formula based on BMI, age and sex: body fat % = 1.20 × BMI + 0.23 × age − 10.8 × sex − 5.4. It's a quick estimate — calipers, DEXA or a tape method are more precise.
Frequently asked questions
What is a healthy body fat percentage?
Roughly 8–19% for men and 21–32% for women is considered healthy, depending on age and activity.
How accurate is this estimate?
It's a rough estimate based on BMI, not a direct measurement, so it can miss for very muscular or very lean people.
How can I measure body fat more precisely?
DEXA scans, skinfold calipers and the US Navy tape method are more accurate than BMI-based formulas.