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Free Fitness Tool
Body Fat Percentage Calculator
Get a fast body fat percentage estimate using your BMI, age, and gender, no calipers needed.
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Not medical advice: This content, and any calculator results on this site, are for general informational purposes only and are not a substitute for professional medical advice, diagnosis, or treatment. Always talk to a qualified healthcare provider before starting a new diet, exercise routine, or health program.
Don't know your BMI yet? Calculate it here first, then come back and paste it in above.
How It Works
How it's calculated
This estimate starts from your BMI, then adjusts for your age and gender. Body fat at a given BMI tends to creep up as people get older, and it differs between men and women at the same BMI too. That adjustment makes this method more useful than BMI alone, though it still can't replace a direct measurement.
How to interpret your result
A commonly cited healthy range sits around 10 to 20 percent for men and 18 to 28 percent for women, though experts differ slightly on the exact cutoffs. Since this method builds on BMI, it inherits the same blind spot: it can't tell muscle from fat. A lean, muscular person may see a higher number here than their true body fat.
Frequently Asked Questions
How reliable are BMI based body fat estimates?
They work reasonably well for most people, but they can miss badly for athletes, older adults, and anyone with above average muscle, since the underlying BMI number can't separate fat from muscle.
What's a healthy body fat percentage for men compared to women?
Commonly cited healthy ranges run around 10 to 20 percent for men and 18 to 28 percent for women. Women naturally carry more essential fat than men, which is why the ranges sit higher for them.
What gives a more accurate reading than this?
Skinfold calipers, bioelectrical impedance scales, and DEXA scans all measure body composition more directly. This calculator works best as a free, quick estimate, not a substitute for those tools when precision really matters.