Muscle Mass Percentage Calculator
Calculate your muscle mass as a percentage of total body weight.
Loading tool...
Frequently Asked Questions — Muscle Mass Calculator
What is a good muscle mass percentage?+
Typical skeletal muscle % of total body weight: Men: 38-54% (25-50% BF dependent). Women: 28-39%. Athletes (male): 45-55%. Female athletes: 35-45%. These vary significantly with fitness level and body fat %.
How accurate are BIA scales for muscle mass?+
BIA (bioelectrical impedance) scales: ±4-8% accuracy for body fat/muscle mass. DEXA scan is gold standard (±1-2%). Hydrostatic weighing: ±2-3%. For trending purposes, BIA is useful if measured under consistent conditions (same time, hydration state).
Is muscle heavier than fat?+
Yes — muscle density is 1.06 g/cm³ vs fat density of 0.9 g/cm³. So muscle is about 18% denser than fat. This means a person with higher muscle mass but same weight as a fatter person will appear leaner (smaller volume).