♡ Health and fitness

Body fat estimate calculator

A rough body-fat estimate from BMI, age and a formula coefficient.

Rules reviewed: 2026-10-13BS / EN
01

Your inputs

Starting values are an example. Replace them with your own.

After changing units, enter measurements in the selected system.

Your inputs stay in your browser.

02

Your result

Enter your details and run the calculation.

METHOD

How it is calculated

Body fat % = 1.20 × BMI + 0.23 × age − 10.8 × sex coefficient − 5.4.