A gallon of water weighs 8.34 pounds, so a 55-gallon drum of water would weigh 459 pounds. This is based on the weight of water being 1 gram per milliliter. The density of water is 1 gram per cubic centimeter or 1,000 kilograms per cubic meter.
A 55 gallon drum of water weighs about 485 pounds. That’s a lot of water! But it’s also a lot weight to lug around.
So, if you’re ever in need of a large quantity of water, make sure you have a way to transport it safely and securely.
How Much Does a Gallon of Water Weigh
A gallon of water weighs 8.34 lbs or 3.78 kg. This is the weight of a gallon of water at standard temperature and pressure (STP). The density of water is 1 gram per cubic centimeter (1 g/cm3) at STP, so a gallon of water has a mass of about 3785 grams or 8.34 pounds.

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How Much Does 1 Gallon of Water Weigh?
Water is one of the most essential substances on Earth. Every living thing needs water to survive. But how much does water weigh?
One gallon of water weighs 8.34 pounds, or 3.78 kilograms. This is because a gallon of water is equal to 128 fluid ounces, and each ounce of water weighs 0.065 pounds, or 0.029 kilograms.
Interestingly, a gallon of milk weighs about 8.6 pounds, or 3.9 kilograms.
This is because milk contains fat and other solids which add weight.
How Much Does 50 Gallon of Water Weigh?
A gallon of water weighs 8.34 lbs, so 50 gallons of water would weigh 417 lbs.
How Much Does a 55 Gallon Drum Weight?
A 55 gallon drum can weigh anywhere from 140 to 250 pounds when empty. The weight will vary depending on the material the drum is made out of. For example, a steel drum will be on the heavier end while a plastic or fiberglass drum will be lighter.
The contents of the drum will also affect its weight.
How Heavy is a 45 Gallon Drum of Water?
If you’re looking to store or transport water, one of the most common options is the 45 gallon drum. But just how heavy is a full 45 gallon drum of water?
To answer this question, we need to consider the weight of both the water and the empty drum itself.
A typical 45 gallon drum weighs around 20-25 pounds when empty. When filled with water, a 45 gallon drum will weigh approximately 400 pounds.
This means that a full 45 gallon drum of water is quite heavy and not something that can easily be moved by one person.
If you need to move or transport a full Drum, it’s important to have multiple people available to help with the task.
How Much Does A Gallon Of Water Weigh?
Conclusion
A 55 gallon drum of water weighs about 485 lbs, give or take a few depending on the exact dimensions and density of the water. The weight of a gallon of water is about 8.34 lbs, so multiply that by 55 to get the total weight.