Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method.
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Estimate Your Body Fat Percentage
Our Body Fat Calculator uses the U.S. Navy method with circumference measurements to provide a reliable estimate of your body composition and help you track your fitness progress.
What is a Body Fat Calculator?
A Body Fat Calculator is a health tool that estimates the percentage of your total body weight that is composed of fat. Unlike BMI, which only considers height and weight, body fat percentage provides a more accurate picture of your health and fitness level by distinguishing between fat mass and lean mass (muscles, bones, organs).
How It Works: The U.S. Navy Method
This calculator uses a method developed by the U.S. Navy that relies on simple circumference measurements:
For Men: Body Fat % = 86.010 × log₁₀(waist - neck) - 70.041 × log₁₀(height) + 36.76
For Women: Body Fat % = 163.205 × log₁₀(waist + hip - neck) - 97.684 × log₁₀(height) - 78.387
Frequently Asked Questions
How is body fat percentage calculated?
There are many ways to calculate body fat percentage. Our calculator uses the U.S. Navy method, which involves taking circumference measurements of the neck, waist, and (for women) hips, along with your height. This method provides a reliable estimate without the need for expensive equipment.
What is a healthy body fat percentage?
A healthy body fat percentage varies by age and gender. For men, a range of 14-17% is considered 'Fitness,' while 18-24% is 'Average.' For women, 21-24% is 'Fitness,' and 25-31% is 'Average.' Elite athletes often have lower percentages.
Is body fat percentage a better measure than BMI?
Body fat percentage is generally a better indicator of health than BMI because it directly measures your body composition (fat vs. lean mass), whereas BMI is just a ratio of height and weight. A person with a lot of muscle can have a high BMI but a low, healthy body fat percentage.
How can I lower my body fat percentage?
Lowering body fat percentage involves a combination of a slight caloric deficit (eating fewer calories than you burn) and, crucially, regular strength training to build or maintain muscle mass while you lose fat.
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