**How much does a gallon of water weigh? A gallon of water weighs 8.33 pounds in the USA and 8.9 pounds in the UK. One gallon is 4.5 liters and the U.S. gallon equals 3.78 liters.**

## How Much Does A Gallon Of Water Weigh

Weight of a gallon of water is about 8.34 pounds (3.78 kg/L). This means that a gallon of water (16 cups) weighs about 128 fluid ounce and this will be about 11-to-12-pound weight (5-5.5 kilogram). A US imperial gallon of water weighs approximately 8.34 pounds, a UK metric gallon of water weighs approximately 10.91 pounds.

1 Imperial gallon is equal to 4.54609 liters. The metric equivalent is 3.785411784 liters.

That’s a little more than a pound heavier than a gallon of milk. On the other hand, if a gallon of water weighs a lot, how much does a quart of water weigh? One-quart weighs about 17.5 pounds. That’s a lot. You can see that when you buy a gallon, you’re getting a lot more water than when you buy a quart.

The weight of a liquid gallon of water in the UK and in the USA also varies in accordance with the room temperature and atmospheric pressure. For example, water in the summer season weighs more than when it’s cold. And when the temperature is higher than 50 degrees, water weights heavier than at 50 degrees when the temperature is less than 50 degrees.

This, of course, assumes that we are talking about pure H2O (water molecules) – water with nothing else but hydrogen and oxygen atoms. Water that has something else dissolved into it, like salt or sugar, will have a higher density and slightly different weight.

For instance, if you dissolve 10 teaspoons of salt into 1 gallon of water, then the resulting liquid will weigh about 8.37 pounds instead of 8.34 pounds. If you were to dissolve 10 teaspoons of sugar into a gallon of water, it would weigh a little more than 8.34 pounds – the weight of pure sugar is greater than pure salt.

In order to state how much something weighs, you have to say what it’s made from and where you’re weighing it.

Doesn’t it make you wander how many gallon do ice weigh when melted? Here’s the converter.

## Bottom Line

Hydrogen is the most common element on the planet. It is the building block of almost everything we see and use. It is hard to perceive because it is so common and we take it for granted. Hydrogen is the fourth most abundant element in the universe and is found in many places.

**How much does a gallon of water weigh? the formula to calculate the weight of a gallon of water is weight = volume x density. The density of water is 1g/cm^3, so the weight of a gallon of water is about 8.33 pounds.**

Resources:

https://www.reference.com/science/much-cubic-foot-water-weigh-ac1656c2efc1f7c8

https://whatthingsweigh.com/how-much-does-a-gallon-of-water-weigh/

https://sciencenotes.org/much-gallon-water-weigh-easy-calculation/