Nope, 1 lb. of fat equals exactly 1 lb. of muscle, but your instinct is right that muscle is more dense than fat. On average, the density of fat is 0.9 g/mL. The density of muscle is 1.1 g/mL. Therefore, one liter of muscle weighs 2.3 lbs., while 1 liter of fat weighs 1.98 lbs. […]
