Imperial gallon to Liter Converter
Type a value — the answer appears instantly. 1 gal (UK) = 4.54609 L.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
4.54609 liters
= 4,546.09 ml= 1.20095 gal
equals 4.54609 litersFormula: L = gal (UK) × 4.54609
Imperial gallon to Liter formula
L = gal (UK) × 4.54609
Convert 5 imperial gallons to liters
- Start with 5 imperial gallons.
- Multiply by the conversion factor: 5 × 4.54609 = 22.7305.
- So 5 gal (UK) = 22.7305 L.
Imperial gallon to Liter conversion table
| Imperial gallons (gal (UK)) | Liters (L) |
|---|---|
| 0.01 gal (UK) | 0.0454609 L |
| 0.1 gal (UK) | 0.454609 L |
| 0.25 gal (UK) | 1.13652 L |
| 0.5 gal (UK) | 2.27305 L |
| 1 gal (UK) | 4.54609 L |
| 2 gal (UK) | 9.09218 L |
| 3 gal (UK) | 13.6383 L |
| 4 gal (UK) | 18.1844 L |
| 5 gal (UK) | 22.7305 L |
| 6 gal (UK) | 27.2765 L |
| 7 gal (UK) | 31.8226 L |
| 8 gal (UK) | 36.3687 L |
| 9 gal (UK) | 40.9148 L |
| 10 gal (UK) | 45.4609 L |
| 15 gal (UK) | 68.1914 L |
| 20 gal (UK) | 90.9218 L |
| 25 gal (UK) | 113.652 L |
| 30 gal (UK) | 136.383 L |
| 40 gal (UK) | 181.844 L |
| 50 gal (UK) | 227.305 L |
| 75 gal (UK) | 340.957 L |
| 100 gal (UK) | 454.609 L |
| 250 gal (UK) | 1,136.52 L |
| 500 gal (UK) | 2,273.05 L |
| 1,000 gal (UK) | 4,546.09 L |
| 5,000 gal (UK) | 22,730.5 L |
| 10,000 gal (UK) | 45,460.9 L |
Unit definitions
What is a imperial gallon?
The imperial (UK) gallon is defined as exactly 4.54609 litres. It is used for fuel economy and liquid volumes in the United Kingdom and some Commonwealth countries. It is larger than the US gallon.
What is a liter?
The litre is the metric unit of volume equal to one cubic decimetre, or 1000 cubic centimetres. It is the standard measure for beverages, fuel, and fluids worldwide. One litre of water weighs almost exactly one kilogram.
Frequently asked questions
How many liters are in one imperial gallon?
One imperial gallon equals 4.54609 liters (1 gal (UK) = 4.54609 L).
How do I convert imperial gallons to liters?
Multiply the value in imperial gallons by 4.54609. For example, 10 gal (UK) × 4.54609 = 45.4609 L.
Which is bigger — a imperial gallon or a liter?
A imperial gallon is bigger: one imperial gallon contains 4.54609 liters.
Is this imperial gallon to liter converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.