What is the mass of one gallon of water?

Answer:

Answer

A gallon is a "Standard" unit, and there is no standard unit for mass. The closest thing is weight, so the WEIGHT of a gallon of water is approximately 8 pounds. If you want mass, you have to convert to metric units, and the mass of a gallon of water is approximately 3.6 kilograms.

First answer by Btrevoryoung. Last edit by Btrevoryoung. Contributor trust: 646 Question popularity: 9 [recommend question].