Imperial Gallons to Liters Converter
One Imperial Gallon equals 4.54609 Liters (1 imp-gal = 4.54609 l). Multiply an Imperial Gallon value by 4.54609 to get the equivalent in Liters. The calculator is above; the formula and worked examples are below.
Formula
l = imp-gal × 4.54609
Multiply the Imperial Gallon value by 4.54609 to get the equivalent value in Liters.
Example Conversions
1 Imperial Gallon (imp-gal)
4.54609 Liter (l)
5 Imperial Gallon (imp-gal)
22.73045 Liter (l)
10 Imperial Gallon (imp-gal)
45.4609 Liter (l)
25 Imperial Gallon (imp-gal)
113.65225 Liter (l)
100 Imperial Gallon (imp-gal)
454.609 Liter (l)
Conversion Table
| Imperial Gallon (imp-gal) | Liter (l) |
|---|---|
| 0.1 | 0.454609 |
| 0.5 | 2.273045 |
| 1 | 4.54609 |
| 2 | 9.09218 |
| 5 | 22.73045 |
| 10 | 45.4609 |
| 25 | 113.65225 |
| 50 | 227.3045 |
| 100 | 454.609 |
| 250 | 1136.5225 |
| 500 | 2273.045 |
| 1000 | 4546.09 |
How to Convert Manually
Use these steps to convert Imperial Gallon values to Liter without the calculator.
- Write down the value in Imperial Gallon (imp-gal) that you want to convert.
- Multiply that value by 4.54609.
- For example, 10 Imperial Gallons × 4.54609 = 45.4609 Liters.
- Label the result as Liter (l).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Imperial Gallon and one Liter.
About Imperial Gallon and Liter
The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. UK fuel economy figures (mpg) and older Commonwealth documents use it. The liter is exactly one cubic decimeter, a cube 10 cm on each side. Beverages, fuel, and engine displacement are sold and specified in liters across the metric world. One Imperial Gallon equals 4.54609 Liters (1 imp-gal = 4.54609 l). Imperial Gallon is used in UK fuel economy figures and in historical Commonwealth measurements. Liter is used in beverage bottles and cartons.
Precision and Rounding:US and imperial volume units share names but differ in size (an imperial gallon is about 20% larger than a US gallon), so confirm which system a figure uses before converting. Kitchen work tolerates rounding to the nearest milliliter or quarter-teaspoon; fuel, chemistry, and brewing need three or more decimal places.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15Imperial Gallons equals68.19135Liters.
15 imp-gal × 4.54609 = 68.19135 l
FAQ
How do I convert Imperial Gallon to Liter?
Multiply the Imperial Gallon value by 4.54609 to get the equivalent value in Liters.
What is the formula for Imperial Gallon to Liter?
The formula is l = imp-gal × 4.54609.
How many Liters are in 1 Imperial Gallon?
1 Imperial Gallon equals 4.54609 Liters.
Can I convert Liter back to Imperial Gallon?
Yes. 1 Liter equals 0.2199692483 Imperial Gallons, and the related converter can reverse the calculation.
What are common names for Imperial Gallon and Liter?
Imperial Gallon is shown as imp-gal and may also be searched as imperial gallons, uk gallons. Liter is shown as l and may also be searched as liters, litre, litres.
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