How much does a gallon weight in pounds?

Answer 1

Pounds is a unit of mass/weight. Gallons is a liquid measure. They do not convert cleanly. The density of the liquid being measured can make a big difference. If the liquid is water, there is 8 pounds to a gallon.

Answer 2

There is no sensible answer to the question. Gallons are a measure of volume while pounds are a measure of mass. The two measure different things and it makes no sense to try to convert from one to the other. For example, a gallon of molten lead would have a mass considerably greater than a gallon of hydrogen gas!