Fat-Free Mass & Hydration Calculator

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Calculate your total fat-free lean body mass and estimate your body water hydration capacity.

Body Weight (kg)

Body Fat Percentage (%)

Muscle Hydration and Fat-Free Mass

**Fat-Free Mass (FFM)** consists of muscles, bones, organs, and connective tissues. Because muscle tissue is roughly 73% water, maintaining high hydration levels directly supports muscular cellular volume and athletic strength progression.

Häufig gestellte Fragen

Unlike fat tissue which is hydrophobic, active muscle tissue holds large amounts of intracellular glycogen and water.

Dehydration shrinks muscle volume, decreases glycogen synthesis, and limits peak power output.