Body Fat Percentage Calculator
Estimate Your Body Fat Percentage
This Body Fat Percentage Calculator provides a quick estimate of your body fat percentage using the BMI-based formula. Simply enter your age, sex, weight, and height to get an approximate result. Note that this formula provides a general estimation and may not be accurate for athletes or people with very high muscle mass.
Enter Your Details
Enter your age in years.
Select your biological sex.
Enter your weight in kilograms.
Enter your height in centimeters.
About This Calculator
The formula used is based on the BMI (Body Mass Index) method:
Body Fat % = (1.20 × BMI) + (0.23 × Age) − (10.8 × Sex) − 5.4
- For Sex, use 1 for males and 0 for females.
- This method provides a rough estimate and is not a substitute for professional body composition testing.
Example: A 30-year-old male, 70kg, 175cm tall has a BMI of 22.86. His estimated body fat = (1.20 × 22.86) + (0.23 × 30) − (10.8 × 1) − 5.4 = 17.5%.