Convert Imperial Gallon to Liter
Convert Imperial Gallon to Liter instantly. 1 imp gal = 4.54609 L. Formula, worked examples and a quick reference table.
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One imperial gallon equals 4.54609 liters. To convert any number of imperial gallons to liters, multiply by 4.54609.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Imperial Gallon to Liter formula
To go the other way, use imperial gallon = liter ÷ 4.54609.
About these units
The imperial gallon is 4.546 litres — roughly 20% larger than the US gallon. This is why UK miles-per-gallon figures look better than American ones for the same car.
A litre is exactly one cubic decimetre, or 1,000 cubic centimetres. One litre of water weighs almost exactly one kilogram, which is not a coincidence.
Imperial Gallon to Liter conversion table
| Imperial Gallon | Liter |
|---|---|
| 1 imp gal | 4.5461 L |
| 2 imp gal | 9.0922 L |
| 3 imp gal | 13.6383 L |
| 5 imp gal | 22.7305 L |
| 10 imp gal | 45.4609 L |
| 20 imp gal | 90.9218 L |
| 25 imp gal | 113.6523 L |
| 50 imp gal | 227.3045 L |
| 100 imp gal | 454.609 L |
| 250 imp gal | 1,136.5225 L |
| 500 imp gal | 2,273.045 L |
| 1,000 imp gal | 4,546.09 L |
Frequently asked questions
How many liters are in a imperial gallon? +
There are 4.54609 liters in one imperial gallon.
What is 10 imp gal in L? +
10 imp gal equals 45.4609 L. Multiply 10 by 4.54609.
How do I convert liter back to imperial gallon? +
Use imperial gallon = liter ÷ 4.54609. The converter above handles both directions, or see our dedicated Liter to Imperial Gallon page.