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Body Fat Percentage Calculator

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Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate body fat percentage using your body mass index (BMI) value.

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Body fat calculation

The body fat percentage is a measure of fitness level; The calculation on this page use the formula derived by Deurenberg and co-workers to find the amount of body fat:
Child body fat % = (1.51 * BMI) - (0.70 * Age) - (3.6 * sex) + 1.4

Adult body fat % = (1.20 * BMI) + (0.23 * Age) - (10.8 * sex) - 5.4

where, sex is 1 for males and 0 for females. Adults is taken as 15 years or older for this calculation.

Typical Body fat amounts
DescriptionWomenMen
Essential fat10.13%2.5%
Athletes14.20%6.13%
Fitness21.24%14.17%
Average25.31%18.24%
Obese32%+25%+

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