How much does a gallon of whole milk weigh?

In this brief article we are going to answer the question “How much does a gallon of whole milk weigh?”, we will also discuss different methods of measuring milk

How much does a gallon of whole milk weigh?

One gallon of milk weighs 8.6 lb or 3.9 kg at room temperature in the US, while a gallon of milk weighs 10.32 lb or 4.68 kg in the UK. The variation comes from the cow breed and fat percentage in milk.

Different types of gallons:

In every country worldwide, the measurements are done based on a standard system of that country. The most common standards are of US and UK measuring systems. Though the amount of liquid a gallon holds can vary depending on the measuring system. So:

1.     In the US, one gallon is equivalent to 3.785 Litres or 231 cubic inches

2.     In the UK, the British imperial gallon is equal to 4.546 liters or 277.4 cubic inches

3.     A US dry gallon is equivalent to 4.405 liters or 268.8 cubic inches

As these measurements are different, so is the weight of milk all around the world. You can measure it based on the calculations done by the system you are considering.

In US measurement system:

1-liter milk = 1.03 Kg

and1 US gallon = 3.7854

so milk in 1 US gallon:

3.7854*1.03 = 3.8989 Kg

In UK measurement system:

1 UK gallon = 1.201 US gallon


1 UK gallon of milk = 1.201*3.8989

= 4.682 Kg

You can also change the units depending on the system you are using. 3.90 kg approximately equals 8.6 pounds and 137.6 ounces in the US measurement system.

The difference in weight of a Gallon of Water and Gallon of Milk

The difference in gallon’s weight also occurs depending on the liquid present, which means you get different results if you compare water with milk. In the UK gallon, a gallon of milk is equivalent to 10.32 pounds, while the same gallon of water weighs 10.02 pounds. In the US measurement system, the same gallon of water weighs 8.35 pounds, which is 8.6 pounds of milk.

How much a gallon of 2% milk weighs?

In milk with 2% fat in it, the fat is still present, and it weighs 2% of milk weight. In fat-free milk, the fats are not removed but are only 2% or less. So the effect on weight is not that significant. Whole milk has 126.75 grams of fats in it, and fat-free milk or 2% milk weighs 117 grams of milk. It is an insignificant change, and it might not affect the gallon’s weight as much as we want to.

How much a gallon of 1% milk weighs?

We have 39 grams of fat in a gallon of milk if it has only 1% of fat in it. The gallon of whole milk still weighs the same, i.e.,126.75 to 195 grams. Then 1% fat milk might weigh as heavy as 87.75 grams to 157 grams.

How much Does a half-gallon weigh?

A full US gallon filled with milk weighs 8.6 pounds or 3.90 kg. If we deduct half of it, we get 4.3 pounds or 1.95 kilograms, a half-gallon weight in the US.

The British imperial gallon weighs 10.322 pounds or 4.682 kg, and half of it will be equal to 5.161 pounds or 2.341 kg, respectively. It is the weight of a half-gallon of milk when weighed according to the UK system.

How much does a gallon of skim milk weigh?

Skim milk is when the fat percentage is 0.2% in milk. It affects the weight of whole milk as the fat content decreases. It is measured in the same way as the weight of 2%, and 1% milk is measured. It may range from 1 to 78 grams of fat in one gallon. Even though the amount is significantly low, it causes a very insignificant change in total weight

How much does a gallon of cow milk weigh?

As the milk of different cows is different depending on the breed, weight, and area in which the cow is present. Milk also affects the weather and feed of the cow. So it can’t be adequately measured what a gallon of cow milk will weigh. Cow milk also has different percentages of fat in its milk; it can range from 3.25% to 5%. The measurement can be done on a weight scale considering the fat and measuring system before measurement.


In this brief article we answered the question “How much does a gallon of whole milk weigh?”, we discussed different methods of measuring milk




Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.

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