One united state gallon of water weighs roughly 8.33 pounds or 3.78 kilograms at room temperature. The an accurate weight the water varies according to its level the density, which subsequently depends ~ above its warehouse temperature.

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You can learn an ext about the load of water - and shot out ours water weight calculator and also reference graph - when you dip your toe into our handy guide below.

## How much is a gallon the water?

If we're talking around the weight of a gallon of water, we should be clear about what a gallon actually is.

In the US, a gallon is 128 liquid ounces, or 3.785 liters.

For the benefits of the question, 'How lot does a gallon the water weigh?', we are going to focus on the American gallon (128 fl oz).

## How much does water weigh?

People supplied to go by the dominance that a liter of water weighed a kilogram. Simple, huh? The beauty, beauty of the metric device is in its tidiness: 1cm³ that water is 1ml, and also weighs 1g. Therefore 1L of water (1000ml) weighs 1kg (1000g).

And wouldn't the be wonderful if it yes, really was that straightforward?

## What is the weight of a gallon that water?

A us gallon that water weighs around 8lb, yet the precise measurement really counts on a couple of environmental components that we'll go you with now.

### What transforms the weight of water?

As you'll recognize from boiling water on the hob, or freeze it into cubes, water can change its state. This are extreme examples, yet even middle fluctuations in temperature do have an impact on the behaviour, and therefore the weight, of water.

Similarly, simply as the load of water would be various on land, at the bottom of the ocean, or on the moon, atmospheric transforms have an impact on its mass.

### How does temperature influence the load of water?

When you warmth up water, you rise its energy. Basically, water molecules get excited and start bashing every other about like a crowd of rabid shoppers on black Friday. The lot of space each molecule now requirements is greater, since they're rotate around, high-kicking and also elbowing one another, instead of was standing calmly in line. So raising the energy (i.e. Heat) that water to reduce its density. Molecule become an ext spaced out.

Therefore, if you have a gallon pitcher that you fill with cold water from the tap, it will certainly weigh much more than a pitcher of boil water. The density of the cold water is greater, so an ext molecules fit in a given space (the gallon pitcher) than would certainly be in the warm water.

The tl;dr variation ("too long; didn't read") is the hotter water weighs less, and colder water weighs more.

I tried that myself in the kitchen just now, utilizing a pint glass. A pint of cold water sweet 560g, but a pint of warm water weighed simply 530g. Less water right in the glass. (I assumption: v the lesson here is come order a pint of warmth beer if you're do the efforts to cut down ~ above alcohol, in i m sorry case, us Brits are some yes, really health-conscious folks.)

## Alright, but... Exactly how much does a gallon of water weigh?

Water is most dense when it's at 39.2ºF, or 4ºC. In ~ this temperature, a gallon that water weighs roughly 8.345lb. Rotate the heating way up to 200ºF though, and also a gallon of water will certainly weigh roughly 8.04lb. At room temperature (70°F or 21°C), a gallon the water weighs 8.33lb (3.78kg).

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Check the end the recommendation table below to see how gallons that water interpret into pounds and kilograms, and shot out our water load calculator yourself! If you want to uncover out the weight of any kind of other liquids, offer our gallons to pounds converter a try.

Weight in pounds because that gallons the water Gallons that water Pounds Kilos
1 gallon8.33 lb3.78 kg
2 gallons16.66 lb7.56 kg
3 gallons24.99 lb11.33 kg
4 gallons33.32 lb15.11 kg
5 gallons41.64 lb18.89 kg
6 gallons49.97 lb22.67 kg
7 gallons58.3 lb26.45 kg
8 gallons66.63 lb30.22 kg
9 gallons74.96 lb34 kg
10 gallons83.29 lb37.78 kg
At room temperature (70°F or 21°C). Density of 0.998g/cm³