Body Fat Percentage Calculator
Calculate your body fat percentage with our free, gender-specific tool for adults. Uses an enhanced Deurenberg formula with height, weight, age, and waist circumference.
Last clinically reviewed: April 1, 2026. Next review: October 2026.
Body Fat Calculator
Understanding Body Fat Percentage
Body fat percentage (BFP) measures the proportion of fat mass to total body mass, providing a more nuanced health indicator than BMI alone. Our calculator uses an enhanced version of the Deurenberg equation, which combines BMI, age, gender, and waist‑to‑height ratio adjustments. The final result is calibrated to match clinical averages. See supporting research (PMID 25889322).
Healthy Body Fat Ranges for Adults
| Gender | Essential Fat | Athletic | Healthy | Overweight | Obese |
|---|---|---|---|---|---|
| Male | 2-5% | 6-13% | 14-17% | 18-24% | 25%+ |
| Female | 10-13% | 14-20% | 21-24% | 25-31% | 32%+ |
Source: Adapted from American Council on Exercise (ACE) and American College of Sports Medicine (ACSM) guidelines.
Individual results may vary based on genetics, muscle mass, and lifestyle. For a comprehensive health profile, consider additional assessments like CDC BMI guidelines or NHLBI risk assessment.
Tips for Accurate Measurements
- Measure waist at the narrowest point (above navel, below ribcage) for men; at navel level for women.
- Use a soft tape measure, snug but not tight against the skin.
- Measure height without shoes, weight without heavy clothing, ideally in the morning.
- Repeat measurements 2-3 times and average for best accuracy.
Frequently Asked Questions
How is body fat percentage calculated?
We use an enhanced version of the Deurenberg equation, which combines BMI, age, gender, and waist‑to‑height ratio adjustments. This method provides reliable estimates for non‑athletic adults.
What is a healthy body fat percentage for women?
For adult women, a healthy body fat range is typically 21‑24%, based on ACE and ACSM guidelines. Essential fat (10‑13%) is critical for hormonal health.
What is a healthy body fat percentage for men?
For adult men, a healthy body fat range is typically 14‑17%. Athletic men may have 6‑13%, while 18‑24% indicates overweight and 25%+ indicates obesity.
Is this calculator suitable for athletes or bodybuilders?
No. The formula may overestimate body fat in individuals with above‑average muscle mass. Athletes should consider more accurate methods like DEXA scan or skinfold measurements.
Why is waist measurement important?
Abdominal fat is strongly correlated with overall body fat and health risks, including cardiovascular disease. Including waist circumference improves the accuracy of body fat estimates.
Last clinical review: April 1, 2026. Content aligned with standard body composition guidelines.