UnitSnapImperial Gallons to Liters
1 gal (UK) = 4.54609 L
Imperial gallons to liters is mostly needed in the UK, where fuel is sold by the liter but fuel economy is still quoted in miles per imperial gallon. It also appears in older British and Canadian documents, boat and farm equipment specs, and historical records.
When you need to convert imperial gallons to liters
- Making sense of UK fuel economy figures quoted in miles per gallon
- Reading older British or Canadian tank and container capacities
- Converting volumes in agricultural or marine equipment manuals
- Interpreting historical records that use imperial measures
How to convert imperial gallons to liters
L = gal (UK) × 4.54609
Example: 5 gal (UK) = 22.73045 L
Common volumes
| Imperial Gallons (gal (UK)) | Liters (L) |
|---|---|
| 0.5 gal (UK) | 2.273045 L |
| 1 gal (UK) | 4.54609 L |
| 2 gal (UK) | 9.09218 L |
| 5 gal (UK) | 22.73045 L |
| 10 gal (UK) | 45.4609 L |
| 12 gal (UK) | 54.55308 L |
| 15 gal (UK) | 68.19135 L |
| 20 gal (UK) | 90.9218 L |
| 50 gal (UK) | 227.3045 L |
| 100 gal (UK) | 454.609 L |
Tips for converting imperial gallons to liters
- One imperial gallon is exactly 4.54609 liters. Multiplying by 4.5 is within about 1%.
- Do not use the US gallon figure here; the imperial gallon is about 20% larger.
- An imperial gallon contains 160 imperial fluid ounces or 8 imperial pints, compared with 128 fluid ounces in a US gallon.
Imperial Gallons to Liters conversion table
| Imperial Gallons (gal (UK)) | Liters (L) |
|---|---|
| 1 gal (UK) | 4.54609 L |
| 2 gal (UK) | 9.09218 L |
| 3 gal (UK) | 13.63827 L |
| 4 gal (UK) | 18.18436 L |
| 5 gal (UK) | 22.73045 L |
| 6 gal (UK) | 27.27654 L |
| 7 gal (UK) | 31.82263 L |
| 8 gal (UK) | 36.36872 L |
| 9 gal (UK) | 40.91481 L |
| 10 gal (UK) | 45.4609 L |
| 15 gal (UK) | 68.19135 L |
| 20 gal (UK) | 90.9218 L |
| 25 gal (UK) | 113.6523 L |
| 30 gal (UK) | 136.3827 L |
| 40 gal (UK) | 181.8436 L |
| 50 gal (UK) | 227.3045 L |
| 75 gal (UK) | 340.9568 L |
| 100 gal (UK) | 454.609 L |
| 250 gal (UK) | 1,136.523 L |
| 500 gal (UK) | 2,273.045 L |
| 1,000 gal (UK) | 4,546.09 L |
About the units
Imperial Gallons: The imperial gallon is a British unit of volume equal to exactly 4.54609 liters, about 20% larger than the US gallon.
Liters: The liter is a metric unit of volume equal to one cubic decimeter (1,000 cubic centimeters), used for drinks, fuel and containers.
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Frequently asked questions
How many liters are in 1 imperial gallon?
1 imperial gallon equals 4.54609 liters.
How many imperial gallons are in 1 liter?
1 liter equals 0.2199692 imperial gallons.
How do I convert imperial gallons to liters?
Use the formula L = gal (UK) × 4.54609.
What is 10 imperial gallons in liters?
10 imperial gallons equals 45.4609 liters.
Related conversions
- Liters to Imperial Gallons
- Liters to US Gallons
- US Gallons to Liters
- US Gallons to Imperial Gallons
- Imperial Gallons to US Gallons
- Milliliters to US Fluid Ounces
- US Fluid Ounces to Milliliters
- Liters to Milliliters
- Milliliters to Liters
- Cubic Meters to Cubic Feet
- Cubic Feet to Cubic Meters
- Cubic Meters to Liters
- Liters to Cubic Meters
- All volume units
Factors: NIST SP 811 · SI Brochure · NIST Handbook 44 — Updated