One us gallon the water weighs about 8.33 pounds or 3.78 kilograms at room temperature. The an accurate weight the water different according come its level of density, which consequently depends on its storage temperature.

You are watching: Grams in a gallon of water

You can learn more about the load of water - and shot out our water weight calculator and also reference chart - once you dip her toe into our handy overview below.


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How much is a gallon the water?

If we're talking about the load of a gallon that water, we have to be clear around what a gallon actually is.

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

For the sake of the question, 'How much does a gallon of water weigh?', we space going to emphasis on the American gallon (128 fl oz).

How lot does water weigh?

People offered to go by the dominion that a liter that water weighed a kilogram. Simple, huh? The beauty of the metric device is in the tidiness: 1cm³ the water is 1ml, and weighs 1g. So 1L that 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 the water?

A us gallon of water weighs roughly 8lb, but the precise measurement really relies on a pair of environmental factors that we'll go you through now.

What transforms the load of water?

As you'll know from boiling water ~ above the hob, or freeze it into cubes, water can readjust its state. These are too much examples, but even moderate fluctuations in temperature do have actually an impact on the behaviour, and also therefore the weight, the water.

Similarly, just as the load of water would certainly be various on land, at the bottom of the ocean, or top top the moon, atmospheric changes have an influence on the mass.

How go temperature affect the weight of water?

When you warm up water, you boost its energy. Basically, water molecules gain excited and start bashing each other about like a group of rabid shoppers on black color Friday. The amount of an are each molecule now requirements is greater, since they're spinning around, high-kicking and also elbowing one another, rather of was standing calmly in line. So raising the energy (i.e. Heat) of water reduce its density. Molecule become an ext spaced out.

Therefore, if you have actually a gallon pitcher the you fill v cold water native the tap, it will weigh more than a pitcher of boiling water. The density of the cold water is greater, so an ext molecules right in a given room (the gallon pitcher) than would be in the hot water.

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

I tried the myself in the kitchen simply now, using a pint glass. A pint the cold water weighed 560g, but a pint of hot water weighed just 530g. Less water right in the glass. (I assumption: v the lesson here is come order a pint of warmth beer if you're trying to reduced down on alcohol, in which case, us Brits are some yes, really health-conscious folks.)

Alright, but... Exactly how much walk a gallon the water weigh?

Water is most dense when it's in ~ 39.2ºF, or 4ºC. In ~ this temperature, a gallon that water weighs roughly 8.345lb. Turn 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 that water weighs 8.33lb (3.78kg).

See more: The Lowest Point Of A Wave ? Jetstream Max: Anatomy Of A Wave


Check out the referral table listed below to see exactly how gallons the water analyze into pounds and kilograms, and shot out our water load calculator yourself! If you want to uncover out the load of any type of other liquids, provide our gallons to pounds converter a try.


Weight in pounds for gallons of 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). Thickness of 0.998g/cm³

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Convert gallons of water come weight

Convert gallons of water come pounds, ounces, grams and kilograms making use of the calculator below. This web links in to our water weight calculator.


Water temperature:32°F / 0°C39.2°F / 4.0°C40°F / 4.4°C50°F / 10°C60°F / 15.6°C70°F / 21°C (room temp)80°F / 26.7°C90°F / 32.2°C100°F / 37.8°C120°F / 48.9°C140°F / 60°C160°F / 71.1°C180°F / 82.2°C200°F / 93.3°C212°F / 100°C