The imperial gallon is a unit of volume used in the imperial measurement system, and it is historically common in the United Kingdom and several other countries. One imperial gallon is equal to 4.54609 liters, which makes it significantly larger than the US gallon (approximately 3.785 liters). It is abbreviated as gal and traditionally used for measuring liquids in larger quantities.
In the imperial system, a gallon is made up of four quarts, eight pints, or 160 imperial fluid ounces. Though the UK has officially adopted the metric system, the imperial gallon is still recognized in specific contexts and remains part of British measurement history. It's most commonly associated with fuel pricing and older food or drink packaging.
Uses: The imperial gallon is most commonly seen today at fuel stations in the UK, where petrol and diesel are still sold by the gallon for pricing comparisons, even though the actual quantity delivered is measured in liters. Historically, the gallon was used for everything from milk deliveries to beer and cider sales.
While modern recipes and packaging have largely shifted to liters and milliliters, the imperial gallon occasionally appears in traditional instructions or product specs, especially for bulk liquids. For those referencing older materials or converting classic measurements, the imperial gallon remains a useful and historically significant unit.
The gallon (US) is a large unit of volume used in the U.S. customary measurement system. One US gallon is equal to 128 US fluid ounces, or approximately 3.785 liters. It's commonly abbreviated as gal and is often used for measuring larger quantities of liquids in household and commercial settings.
As one of the largest common units for liquid measurement in the United States, the gallon is widely recognized for storing and transporting liquids like milk, water, and gasoline. Its size makes it practical for bulk quantities and remains a standard unit in industries ranging from agriculture to retail packaging.
Uses: In everyday life, the US gallon is most commonly seen on milk jugs, bottled water, and fuel pumps. Whether you're filling up a gas tank or picking up a gallon of juice at the grocery store, this unit is a familiar part of American routines.
Beyond the home, the gallon is used across industries that handle large volumes—such as food service, chemical production, and farming. It's also a staple in recipes or instructions for making batches of beverages, soups, or cleaning solutions. Thanks to its capacity and widespread use, the gallon remains one of the most practical and recognizable units for measuring liquids in bulk.
1 gal (imp) = 1.20095 gal
Let’s say you want to convert 100 gal (imp) to gal.
Using the formula:
100 × 1.20095 = 120.095 gal
So, 100 gal (imp) is approximately 120.095 gal.
| Gallon (Imperial) (gal (imp)) | Gallon (US) (gal) |
|---|---|
| 1 gal (imp) | 1.201 gal |
| 2 gal (imp) | 2.402 gal |
| 3 gal (imp) | 3.603 gal |
| 4 gal (imp) | 4.804 gal |
| 5 gal (imp) | 6.005 gal |
| 6 gal (imp) | 7.206 gal |
| 7 gal (imp) | 8.407 gal |
| 8 gal (imp) | 9.608 gal |
| 9 gal (imp) | 10.809 gal |
| 10 gal (imp) | 12.01 gal |
| 11 gal (imp) | 13.21 gal |
| 12 gal (imp) | 14.411 gal |
| 13 gal (imp) | 15.612 gal |
| 14 gal (imp) | 16.813 gal |
| 15 gal (imp) | 18.014 gal |