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Fat-Free Mass Calculator

BMI (kgm-2)


FFM (kg)



This application calculates fat-free mass (FFM) for adults and children based on sex, height, weight, and age. The models used in this app are based on work by Janmahasatian et al (CPK 2005) and Al-Sallami et al (CPK 2015). The user is responsible for the accuracy and plausibility of the covariates entered. This app was developed in javascript by Luke Erickson (ITS, Otago) in collaboration with Hesham Al-Sallami (Pharmacy, Otago).