Estimate your body fat percentage using your gender, age, height, weight, waist, neck, and hip measurements, and view estimated fat mass, lean body mass, and body fat reference ranges.
Enter your body measurements to estimate body fat percentage using the U.S. Navy Body Fat Method.
These ranges are for general reference only. Body fat ranges can vary by age, measurement method, and population. The estimated result should not be used as a medical diagnosis.
This calculator uses the U.S. Navy Body Fat Method. The method estimates body fat percentage using height and body circumference measurements. Measurements entered in centimeters are converted to inches before applying the formula.
Men generally need height, waist circumference, and neck circumference. Women also need hip circumference. Stand naturally and use a flexible measuring tape. Keep the tape level and snug without compressing the skin. Try to measure under similar conditions each time.
BMI is calculated from height and weight and does not directly distinguish between fat and muscle. Body fat percentage estimates the proportion of your total body weight that is fat, providing additional body composition information that BMI alone cannot provide.
This calculator provides an estimate based on body measurements and does not replace professional body composition testing or medical evaluation. Hydration, measurement technique, body shape, physical activity, and individual differences can affect the result.
Body fat percentage (BF%) is the proportion of your total body weight that consists of fat. Compared with body weight alone, body fat percentage provides additional information about the relationship between fat tissue and non-fat tissue. It is commonly used for fitness, weight management, and body composition assessment.
Male body fat percentage can be estimated using height, waist circumference, and neck circumference. This calculator uses the U.S. Navy Body Fat Method, which estimates body fat based on the relationship between body circumference measurements and height.
Female body fat percentage can be estimated using height, waist circumference, neck circumference, and hip circumference. This calculator uses the U.S. Navy Body Fat Method, which includes hip circumference in the calculation for women.
Body fat reference ranges vary depending on sex, age, fitness level, and measurement method. Men and women generally have different body fat ranges, so a single body fat percentage should not be used to evaluate everyone.
BMI is primarily based on height and weight, while body fat percentage estimates how much of your total body weight is fat. Because BMI cannot distinguish between fat and muscle, people with high muscle mass may have a higher BMI while still having a relatively low body fat percentage.
This method provides an estimate rather than a direct measurement. Results can be affected by measurement location, measurement technique, body shape, hydration, and individual differences. It can be useful for general reference and tracking trends, but it does not replace more precise methods such as DEXA or professional body composition testing.
The U.S. Navy Body Fat Method uses different formulas for men and women. The female formula includes waist, hip, and neck measurements, so hip circumference is required when estimating body fat percentage for women.
Estimated fat mass is calculated from body weight and body fat percentage. The formula is: Fat Mass = Body Weight × Body Fat Percentage ÷ 100. For example, if your weight is 70 kg and your body fat percentage is 20%, your estimated fat mass is about 14 kg.
Lean body mass is your total body weight minus estimated fat mass. It includes muscle, bones, water, organs, and other non-fat tissues. The formula is: Lean Body Mass = Body Weight − Fat Mass.