You can use 4 pounds as a rough measure. 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.
8 pounds
about 4kg
A touch under 8 pounds.
4,54609188 kilograms There are 4,54609188 litres in an imperial gallon, one litre of water weighs 1 kilogram.
One gallon of fresh water weighs 8.36 pounds (8 pounds 5.76 ounces)
A gallon of water weighs approximately 8.34 pounds.
834
A gallon of milk weighs 8.6 pounds since 1 gallon is double the amount of a half gallon.
about the same as a gallon of water: 8+ lbs
A gallon of water weighs about 8.34 pounds. So, a 50 gallon water heater full of water would weigh approximately 417 pounds.
One gallon of water weighs about 8.35 pounds (about 3.8 kilograms).
== Probably close to the weight of water. 8.34 lbs per gallon.
1 gallon of water weighs 8.34 pounds, or 3.786 kilograms
The weight of water is approximately 8.34 pounds per gallon. So, 400 gallons of water would weigh around 3,336 pounds.
10lbs
A gallon of water weights 8 pounds. It can vary a bit according to temperature.
Interesting question, since sulfur will not dissolve or react with water. But if it did, one gallon of a 1/2% (by weight) solution of "sulfur water" would weigh 8.3817 pounds. (There would be about 2/3rds of an ounce of sulfur "dissolved" in the water.)