Body Fat Percentage Calculator
Body fat percentage tells you more than weight alone — it separates fat from muscle and bone. This estimates it from your height, weight, age and sex, no calipers required.
Your numbers
Result
- Fat masskg
- 17.64
- Lean masskg
- 62.36
| Item | Value |
|---|---|
| Body fat | 22.0% |
| Fat mass (kg) | 17.6 |
| Lean mass (kg) | 62.4 |
How the estimate works
This uses the Deurenberg equation, which predicts body fat from BMI, age and sex: body fat % = 1.2 × BMI + 0.23 × age − 10.8 × sex − 5.4 (sex is 1 for men, 0 for women). From the percentage, your fat mass and lean mass follow directly. It needs no measuring tape — just the four fields.
Typical ranges
Rough healthy bands: men around 10–20%, women around 18–28% (women carry more essential fat). Athletes sit lower; the risk zone is high body fat regardless of weight. Because this is a population estimate from BMI, a very muscular person will read too high — the formula cannot tell muscle from fat.
When to measure directly
For a real number, methods like skinfold calipers, bioelectrical impedance scales or a DEXA scan measure body fat rather than infer it. Use this estimate to track a trend over time; the direction it moves is more reliable than any single reading.
Informational and educational result. Not a substitute for professional advice.
Frequently asked questions
Sources
- Deurenberg P et al. (1991) — body fat from BMI, age and sex
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