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FFMI Calculator

Calculate fat-free mass index and normalized FFMI.

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Clinical Accuracy

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Your Body Measurements

FFMI measures muscular development relative to height — a more meaningful metric than total body weight.

Use our Body Fat Calculator if unsure

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Research Reference

biotechScientific Method

FFMI uses lean body mass and height; normalized FFMI adjusts to 1.8m reference height.

Kouri EM et al. (1995)

Clin J Sport Med.

PMID: 7496846Read paperopen_in_new