A gallon of water weighs 8.34 lbs., or 3.78 kg. This is based on the density of water being 1 g/cm^3.
The weight of a gallon of water will vary slightly depending on temperature and pressure, but for our purposes, we’ll assume that a gallon of water weighs exactly 8.34 lbs.
We all know that water is essential to our survival. But did you know that a gallon of water actually weighs quite a bit? In fact, a gallon of water weighs 8.34 pounds!
That’s not all – a gallon of water also takes up quite a bit of space. In fact, a gallon of water is about the size of a square foot! So if you’re ever in need of some extra water, don’t forget that one square foot can hold a whole lot of it.

Credit: www.worldatlas.com
What Does 1 Pound of Water Weigh?
One pound of water weighs 16 ounces. This is because one pint of water weighs 16 ounces and there are two pints in a pound.
How Much Does a Gallon of Milk Weigh?
A gallon of milk weighs 8.6 pounds, or 3.8 kilograms. This is based on the weight of water, which is 8.3 pounds per gallon. Milk is about 87% water, so it weighs slightly less than water.
How Much Does a 5 Gallon Jug of Water Way?
A five gallon jug of water weighs 41.7 pounds (18.9 kg). The weight of a gallon of water is 8.3 pounds (3.8 kg), so 5 gallons would be 41.7 pounds (18.9 kg).
How Much Does a Gallon of Liquid Way?
A gallon of water weighs 8.34 pounds, so a gallon of any other liquid is going to be very close to that number.
How much does one gallon of water weigh?
How Much Does a Gallon Weigh
A gallon of water weighs 8.34 lbs or 3.78 kg at 62 °F (17 °C). A US gallon is defined as 231 cubic inches (3.785 L) while a UK gallon is 160 fluid ounces (4.546 L). The weight of a gallon will therefore depend on the density of the liquid being measured.
Conclusion
A gallon of water weighs 8.34 pounds, so if you’re trying to lose weight, you should drink plenty of water! It is also important to stay hydrated when working out or in hot weather.