Body Fat Calculator — BMI Estimate

STEP BY STEP

How to use body fat calculator — bmi estimate

1. Enter the labelled values in the displayed units.
2. Review the method: Body fat % = 1.20 × BMI + 0.23 × age − 10.8 × sex − 5.4; sex = 1 male, 0 female.
3. Read the worked example and method limitations.

WHEN IT HELPS

Common uses

• Compare the assumptions: 70 kg, 175 cm, age 30, male coefficient: about 18.13% estimated body fat.

IN PRACTICE

Example

70 kg, 175 cm, age 30, male coefficient: about 18.13% estimated body fat.

GOOD TO KNOW

How accurate is this estimate?

This is a population-based prediction, not a body composition measurement. The original adult model reported a standard error around 4.1 percentage points; individual error can be larger, particularly with unusual muscularity or obesity.