How many gallons of fat have you lost?

A scale tells you that you weigh more, or less, but what does that look like?
Here is a visual image that you can wrap your brain around.

1 US gallon of milk takes up the same space as 7.8lbs of fat --- (231 cubic inches, or 3,785cc)
20lbs of fat is the same size as 2.56/gal of milk --- (591 cubic inches)

So, how many gallons of fat have you lost?
3.67 gallons for me.

1gal = 7.8lbs
2gal = 15.6lbs
3gal = 23.4lbs
4gals = 31.2lbs
5gals = 39lbs

For those challenged by math (Weight you have lost in lbs / 7.8) = gallons

More visuals:

1lb of fat is 29.05 cubic inches, or a cube 3.09 inches on each side
1lb of muscle is 23.89 cubic inches, or a cube 2.88 inches on each side
Stack up the 5 dice in Yahtzee... that is about the difference in size between the two.
So if you lose 10lbs of fat, and gain 10lbs of muscle, the scale says you weigh the same, but you will be 50 dice (51.6 cubic inches) smaller.