Use the Body Fat Calculator for a simple estimate of your body fat percentage from your weight, height, age and sex. This is an estimate, not a measurement.
How to Use
Choose your sex, enter your weight in kilograms, height in centimetres and age in years, then press Calculate.
Formula in Plain Words
First work out BMI by dividing weight by height in metres squared. Then combine BMI and age in a standard estimate formula, with a different final adjustment for men and women.
Worked Example
For a man weighing 80 kg, 180 cm tall and 30 years old, BMI is 24.69, and the estimated body fat is 20.33%.
FAQs
Is this a measurement of my body fat?
No. It is an estimate based on BMI, age and sex, so treat it as a rough guide.
Why does sex change the result?
Because the estimate formula uses a different adjustment for men and women to reflect average differences in body composition.
What if my result looks high or low?
Muscle, bone structure and body shape are not captured by this simple estimate, so use it alongside other health information rather than on its own.