Tip of the Day: Does muscle weigh more than fat? Such a common question and a great one at that! Short answer: no. Long answer: 5lbs of muscle weights the same as 5lbs of fat, just as 5lbs of feathers weighs the same as 5lbs of lead. 5lbs is 5lbs! However, I think this myth arises from the fact that muscle is more dense than far. What does this mean? 5lbs of muscle will physically take up less space than 5lbs of fat on your body. Therefore, two people of equal weight and different body compositions (ie: one person that has more muscle mass and one person that has more body fat) may appear to be different size, such that the individual with more muscle will be “smaller” in size. The picture below helps demonstrate this point!