Body fat estimate
Fitness & body
Body fat estimate
What is my estimated body fat percentage?
Example values are filled in. Replace them with your own.
Example calculation
Estimated body fat: 22.8 %.
Estimated body fat
22.8 %
For adults aged 20 and over. Waist-based and BMI-based formulas can give different estimates. Neither replaces a body-fat measurement or diagnosis. Not for pregnancy.
Body-related results are formula-based estimates, not a diagnosis or a personalized prescription.
See formula and assumptions
Waist method (RFM): 64 − 20 × height/waist + 12 for female. Use cm for both. The measurement site follows the Korean adult validation study. BMI method (Deurenberg): 1.2 × BMI + 0.23 × age − 10.8 for male − 5.4.
- Which measurements will you use?
- Choose waist measurement if you have a tape measure. Otherwise, use height, weight and age for a rough estimate.
- Height (cm)
- Use your height without shoes. For 1 m 75 cm, enter 175.
- Sex used in the formula
- Choose the male or female coefficient used by this estimate. It is not a measurement.
- Waist circumference (cm)
- Measure around the midpoint between your lowest rib and the top of your hip bone. Use a tape measure, not a clothing size.
- Weight (kg)
- Enter your weight in light clothing. Decimals such as 65.5 are accepted.
- Age in years
- Enter your age at your most recent birthday.