One US liquid gallon of fresh water weighs roughly 8.34 pounds (lb) or 3.785 kilograms (kg) at room temperature.

How much does 1 gallon of milk weigh?

A gallon of milk weighs 8.6 lb, and a quart of milk weighs 2.15 lb.

Does a gallon of gas weigh as much as a gallon of water?

A gallon of gasoline weighs just 6 pounds. Far less than water. This is because gasoline is much less dense than water. Just multiply your fuel capacity by 6 and that’s how many extra pounds you are lugging around with you.

A US gallon is 8.34 pounds of water, so a 5-gallon jug of water weighs 41.7 pounds, including the weight of the jug.