Body Fat Calculator
Calculate your body fat percentage using the US Navy measurement method. Understanding your body composition is more accurate than BMI alone.
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Keep tape snug but not tight for accurate measurements
Measure at your belly button level, keeping tape horizontal
Measure just below your Adam's apple, keep tape loose
Measure without shoes, back against wall
Take accurate measurements and click Calculate
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Body Fat vs BMI
Why Body Fat Matters
Body fat percentage tells you the actual composition of your body - how much is fat versus muscle, bone, and organs. Two people with identical weight and height can have vastly different body compositions. An athlete with high muscle mass might have the same BMI as someone with high body fat, but very different health profiles.
The US Navy Method
This calculator uses the US Navy measurement method, which is widely accepted for body fat estimation. It's based on the relationship between body measurements and actual body fat percentage determined through more precise laboratory methods. It's accurate within 3-4% when measurements are taken correctly.
Track the Right Metrics
When changing body composition through exercise and diet, the scale doesn't tell the whole story. You might lose 2 kg of fat while gaining 1 kg of muscle - the scale shows only 1 kg loss, but you've made significant progress. Track body fat percentage, measurements, how clothes fit, and strength gains alongside weight.
Frequently Asked Questions
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