A standard water barrel usually holds 55 gallons in the US. Smaller barrels may hold 15–30 gallons, while larger ones can store 60–100 gallons depending on use.
In this article, we will know how many gallons make a barrel so lets start then.
Understanding Water Barrels
A water barrel is simply a container designed to store water. It can be made up from any material like plastic, metal, or other durable materials.
Some barrels are made for specially drinking water while others are made for non-potable water or other purpose. Their gallon capacity is based on their volume inside.
Standard Water Barrel Sizes
The most popular water barrel in the US is the 55-gallon blue plastic barrel. It’s strong, reusable, and widely available for storage or rainwater harvesting.
Smaller barrels, like 15–30 gallons, are useful when space is limited. Larger barrels, up to 100 gallons, are used for farms and industrial water needs.

Water Barrel Capacity Chart
Different barrels hold different amounts of water. Here’s a quick guide for common sizes:
- 15-gallon barrel – light and portable
- 30-gallon barrel – medium capacity
- 55-gallon barrel – standard size
- 100-gallon barrel – high capacity
Knowing the size helps you plan your water needs.
Weight of a Barrel of Water
One gallon of water weighs about 8.34 pounds. This means a 55-gallon barrel weighs around 458 pounds when full.
Always consider weight before placing or moving a full barrel. Once filled, it’s best to keep it in one spot.
How Many Gallons Make a Barrel for Water
When talking about water, a barrel in the US usually means 55 gallons. However, in other countries, barrel sizes may be different.
Some barrels may be labeled in liters instead of gallons. In that case, a 55-gallon barrel is equals to about 208 liters.
Materials and Types of Water Barrels
Plastic water barrels are common because they’re lightweight and rust-free. Food grade plastic ensures the water is safe to drink.
Metal barrels are stronger but can rust if not coated inside. Collapsible barrels are great for travel or emergency use.

Water Barrel Uses
For barrels, rain water collection is one of the most popular uses. They store free water for gardening and outdoor use.
Emergency water storage helps during natural disasters. It’s recommended to store at least 1 gallon per person per day.
Choosing the Right Size
If you’re storing water for a small family, a 55-gallon barrel is a great choice. It provides enough water for several days.
For farms or large households, multiple barrels or larger sizes work best. Consider your space, budget, and water needs.
Conversion Between Gallons and Barrels
To find how many barrels you need, divide gallons by the barrel size. Example: 220 gallons ÷ 55 gallons per barrel = 4 barrels.
For liters, multiply gallons by 3.785 to get liters. This is useful if your barrel is labeled in metric units.
Safe Water Storage Tips
Keep barrels in a cool, shaded area to avoid algae growth. Always use food-grade barrels for drinking water.
Seal barrels tightly to keep out dust and insects. Clean and sanitize them before filling.
Water Barrel Maintenance
Check your barrels every few months for leaks. Rotate drinking water every 6–12 months.
Rinse with a water and bleach solution before refilling. This ensures the water stays clean and safe.
How Many Gallons in Other Barrel Types
Rainwater barrels often hold 40–60 gallons. Emergency barrels may be smaller for portability.
Industrial water barrels can exceed 100 gallons. Always check the label for exact capacity.

Regional Differences in Barrel Sizes
In the UK, barrels may be measured in imperial gallons, which are larger. One UK gallon equals about 1.2 US gallons.
Its means that UK barrels can may hold more water than the US barrels. Always confirm the unit before buying or calculating.
Common Mistakes When Measuring
People sometimes confuse gallons with liters. A 55-gallon barrel is about 208 liters, not 155.
Another mistake is assuming all barrels are the same size. Always check the label or measure volume before use.
Personal Experience
I started using a 55-gallon water barrel for rainwater collection a few years ago. At first, I thought one would be enough, but it filled up in a single storm.
Now, I have three connected barrels, storing over 150 gallons, which keeps my garden green even in dry weeks.
Conclusion
Knowing how many gallons make a barrel helps yo right size for your needs.In the US, the standard water barrel holds 55 gallons, but there are smaller and larger options.
Whether for rainwater collection, emergency storage, or farming, choosing the right barrel size ensures you have enough water when you need it most. Always store water safely and keep barrels clean for long-term use.
FAQs – How Many Gallons Make A Barrel
How many gallons are in a standard water barrel?
A standard US water barrel usually holds 55 gallons.
How much does a full 55-gallon barrel of water weigh?
About 458 pounds including the water.
Can I use a non-food-grade barrel for drinking water?
No, only food-grade barrels are safe for storing drinking water.
How many gallons in a rainwater barrel?
Most rainwater barrels hold between 40 and 60 gallons.
How many gallons should I store for emergencies?
At least 1 gallon per person per day for 3–7 days.

John Bobo is an author who enjoys sharing ideas, stories, and insights with readers. He writes to inspire, inform, and connect with people through his work.