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Body Fat Calculator – Calculate Body Fat %, LBM & FFMI
Get your body fat percentage, lean body mass, and Fat-Free Mass Index using US Navy and YMCA methods.
US Navy method uses neck, waist, and hip measurements for more accuracy.
Body Fat Categories
Understanding Body Fat Categories
Essential Fat
M: <6% | F: <14%
Dangerously low - health risks
Athlete
M: 6-14% | F: 14-21%
Very lean - athletic performance
Fitness
M: 14-18% | F: 21-25%
Lean and fit
Average
M: 18-25% | F: 25-32%
Normal range
Above Average
M: 25-32% | F: 32-38%
Higher than ideal
Obese
M: >32% | F: >38%
Health risks - consider reduction
What is Body Fat Percentage?
Body fat percentage is the proportion of your body weight that consists of fat tissue. Unlike BMI, which only considers height and weight, body fat percentage provides a more accurate assessment of your body composition. It's a crucial metric for understanding your health, fitness level, and achieving your body composition goals.
US Navy vs YMCA Methods
US Navy Method
Uses neck, waist, and hip measurements with height for accurate estimation. Generally considered more reliable and is widely used in fitness and military applications.
Pros: More accurate, accounts for body shape
Cons: Requires more measurements
YMCA Method
Quick estimation using waist circumference and body weight. Simpler but less accurate than the Navy method.
Pros: Simple, quick
Cons: Less accurate, doesn't account for body shape
Understanding Your Results
Your body fat percentage helps determine your fitness category and health status. Lean Body Mass (LBM) represents your muscle, bone, and organ weight, while FFMI (Fat-Free Mass Index) indicates your muscle mass relative to your height. For a comprehensive understanding of body fat and its implications, check out our complete body fat guide.
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