Body Fat Calculator
Calculate your body fat percentage using multiple proven methods with detailed health assessments.
US Navy Method (Circumference Based)
Navy Method Results
17.7%
Body Fat Percentage
Fitness
Category
22.9
BMI
What This Means:
The US Navy Method uses body circumference measurements to estimate body fat percentage. It's based on the principle that fat distribution patterns differ between genders and can be predicted from key measurement points.
How it works: The formula calculates body density using logarithmic relationships between circumferences and height, then converts to body fat percentage using the Siri equation.
Accuracy: ±3-5% margin of error. Most accurate for people with typical body fat distribution patterns. May be less accurate for very lean or very obese individuals.
💪 Quick Facts
🧠 Essential fat is vital for brain function
Men: 3-5%, Women: 8-12% minimum for health
📊 Body fat is better than BMI alone
Tracks muscle vs fat changes over time
⚖️ Navy method accuracy is ±3-5%
Convenient with no special equipment needed
🏃 Athletes often have 6-20% body fat
Performance optimized range for most sports
📏 Consistency is key for tracking
Same time of day, hydration, and method
🔬 DEXA scan is the gold standard
±1-2% accuracy but expensive and impractical
🌡️ Body temperature affects measurements
Hydration and stress can alter results
💪 Women naturally have higher body fat
Due to reproductive hormones and physiology