Body Fat
Calculator
Results
- Estimated body-fat percentage
- 18.13%
- Body-fat category
- Average
- Estimated fat mass
- 12.69
- Estimated lean mass
- 57.31
- BMI method
- 18.13%
- Age-reference body fat
- 12.70%
- Estimated fat mass above age reference
- 4.35
Comparison
| Scenario | Body-fat percentage |
|---|---|
| BMI method | 18.13% |
| Age-reference body fat | 12.70% |
Estimated body-fat percentage within the reference scale
American Council on Exercise body-fat categories
| Essential fat | 10–13% | 2–5% | Other range |
| Athletes | 14–20% | 6–13% | Other range |
| Fitness | 21–24% | 14–17% | Other range |
| Average | 25–31% | 18–24% | Current range |
| Obese range | ≥ 32% | ≥ 25% | Other range |
Jackson–Pollock age-reference body-fat percentages
| 20 | 17.7% | 8.5% |
| 25 | 18.4% | 10.5% |
| 30 | 19.3% | 12.7% |
| 35 | 21.5% | 13.7% |
| 40 | 22.2% | 15.3% |
| 45 | 22.9% | 16.4% |
| 50 | 25.2% | 18.9% |
| 55 | 26.3% | 20.9% |
Formula
%BF = 1.20 × BMI + 0.23 × A − 10.8 × S − 5.4; S ∈ {0,1}= 18.13
Note
Tape and BMI equations are population estimates, not direct body-composition measurements or diagnoses. Measurement placement, hydration, muscularity, age, and population differences can materially affect the result; use qualified assessment for health decisions.
More in Health
See all →Frequently asked questions
How does this calculator estimate body fat percentage?+
It typically uses a formula such as the U.S. Navy method, which relies on circumference measurements (neck, waist, and hip for women) along with height, rather than directly measuring fat tissue. This makes it fast and accessible but inherently an estimate rather than a lab-grade measurement.
How accurate is a tape-measurement method compared to methods like DEXA scans?+
Circumference-based formulas are generally within a few percentage points of more precise methods like DEXA or hydrostatic weighing for most people, but can be less accurate for very lean or very heavy individuals. For casual tracking over time, consistency in how you measure matters more than absolute precision.
What's a healthy body fat percentage range?+
Healthy ranges differ by sex and age: commonly cited ranges are roughly 10-20% for men and 18-28% for women, with athletes often falling below these ranges. These are general guidelines, not strict cutoffs, and individual health depends on many other factors too.
Why did my body fat percentage change but my weight stayed the same?+
This usually means your body composition shifted: you gained muscle while losing fat, or vice versa, even though the scale didn't move. Body fat percentage captures this kind of change that weight alone cannot show.
Do I need to measure at the same time of day for consistent results?+
Yes, measuring at a consistent time, ideally in the morning before eating or exercising, reduces the effect of water retention and bloating on your waist and hip measurements. Tracking the trend over weeks is more meaningful than any single reading.