Body Fat Calculator
Estimate your body fat percentage using your sex, age, height, weight, and waist measurements.
Calculate Your Body Fat
Measure around your waist at approximately navel level.
Measure around the neck without tightening the tape.
Required for the female calculation.
Estimated Body Fat
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This is an estimate based on the U.S. Navy body fat formula. Individual results can vary depending on measurement technique.
Estimated Category
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Formula Used
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Quick Examples
175 cm · 70 kg Calculate →
165 cm · 60 kg Calculate →
180 cm · 85 kg Calculate →
170 cm · 75 kg Calculate →
What is the Body Fat Calculator used for?
A Body Fat Calculator estimates the percentage of your body weight that consists of fat. It can provide a general picture of body fat percentage when you enter measurements such as height, weight, waist size, age, and sex, depending on the calculation method. The result is an estimate rather than a direct measurement of body composition.
What information is needed for a body fat calculation?
The information required depends on the formula being used. Common inputs include body weight, height, age, sex, and waist circumference. Some formulas may also require neck or hip measurements. Taking measurements consistently matters because small differences in where or how a measurement is taken can change the resulting body composition estimate.
Why can different body fat formulas give different results?
Different formulas use different measurements, equations, and assumptions about the relationship between body size and body fat. One body fat formula may use height and waist circumference, while another may include weight, neck, hip measurements, or other variables. Because these methods estimate rather than directly measure fat tissue, it is normal for their results to differ somewhat.
How does waist measurement affect a body fat estimate?
Waist circumference can provide information about how body mass is distributed around the abdomen and is included in some body fat calculation methods. If the waist measurement increases or decreases while other inputs stay the same, the estimated percentage may change. For consistency, measure the waist in the same location and under similar conditions when comparing results over time.
What does a body fat percentage result mean?
The result represents the estimated proportion of total body weight that is fat. For example, a result of 20% suggests that an estimated 20% of body weight is fat, with the remainder consisting of lean tissues and other body components. A body fat percentage result should be interpreted in context because age, sex, body composition, and the estimation method can affect its meaning.