UK gallons to liters
1 UK gallon = 4.54609 liters
Type a value in UK gallons (imp gal) to get liters (L) straight away. A UK gallon is larger than a liter, so the number goes up. Both units belong to volume, measured here against the liter.
1 imp gal = 4.54609 L
Formula
L = imp gal × 4.54609
One UK gallon is 4.54609 liters, so multiply the UK gallon value by that factor. Here imp gal is the value in UK gallons and L is the result in liters.
Worked example: 5 UK gallons × 4.54609 = 22.7305 liters.
UK gallons to liters table
| UK gallons (imp gal) | liters (L) |
|---|---|
| 1 imp gal | 4.54609 L |
| 2 imp gal | 9.09218 L |
| 3 imp gal | 13.6383 L |
| 4 imp gal | 18.1844 L |
| 5 imp gal | 22.7305 L |
| 6 imp gal | 27.2765 L |
| 7 imp gal | 31.8226 L |
| 8 imp gal | 36.3687 L |
| 9 imp gal | 40.9148 L |
| 10 imp gal | 45.4609 L |
| 15 imp gal | 68.1913 L |
| 20 imp gal | 90.9218 L |
| 25 imp gal | 113.652 L |
| 30 imp gal | 136.383 L |
| 40 imp gal | 181.844 L |
| 50 imp gal | 227.305 L |
| 60 imp gal | 272.765 L |
| 75 imp gal | 340.957 L |
| 100 imp gal | 454.609 L |
Everyday UK gallons in liters
| What it is | imp gal | L |
|---|---|---|
| an imperial gallon | 1 imp gal | 4.54609 L |
| a jerry can (about) | 5 imp gal | 22.7305 L |
| a small car tank (about) | 10 imp gal | 45.4609 L |
| a family car tank (about) | 15 imp gal | 68.1913 L |
| a large tank | 40 imp gal | 181.844 L |
Quick estimate in your head
Multiply by about 4.5. For 5 imp gal that gives 22.5 L against an exact 22.7305 L, an error of 1.0%.
Watch out for
- UK fuel economy in miles per gallon uses the imperial gallon, so UK mpg figures look about 20% better than US ones for the same car.
About the units
UK gallon (imp gal). The imperial gallon, exactly 4.54609 L, about 20% larger than a US gallon.
Liter (L). 1,000 cm³, one cubic decimeter. Used for fuel, milk and water.
Going the other way, 1 liter is 0.219969 UK gallons.
Questions
How many liters are in 1 UK gallon?
1 UK gallon is 4.54609 liters, and 1 liter is 0.219969 UK gallons.
How do I convert UK gallons to liters?
Use L = imp gal × 4.54609. For example, 5 UK gallons × 4.54609 = 22.7305 liters.
Are US and UK measures the same?
No. This page uses US customary units. A UK gallon is 4.546 L against 3.785 L in the US, and a UK pint is 568 mL against 473 mL.
How much is a large tank in liters?
40 imp gal is 181.844 L.
Source for the conversion factor: NIST Handbook 44, Appendix C (units of volume).
Related conversions
- liters to UK gallons
- liters to US gallons
- US gallons to liters
- liters to milliliters
- milliliters to liters
- cubic meters to liters