Convert Gallon (UK) to imperial gallons
Western Europe · UK vs US Volume · active · modern
Conventional value The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact.
Quick answer
1 Gallon (UK) = 1 imperial gallon
1 Gallon (UK) = 1 imperial gallon. Gallon (UK) is a traditional volume unit from Western Europe.
Convert any amount
Gallon (UK) to imperial gallons table
| Gallon (UK) | imperial gallons |
|---|---|
| 0.25 Gallon (UK) | 0.25 imperial gallons |
| 0.5 Gallon (UK) | 0.5 imperial gallons |
| 1 Gallon (UK) | 1 imperial gallons |
| 2 Gallon (UK) | 2 imperial gallons |
| 3 Gallon (UK) | 3 imperial gallons |
| 4 Gallon (UK) | 4 imperial gallons |
| 5 Gallon (UK) | 5 imperial gallons |
| 10 Gallon (UK) | 10 imperial gallons |
| 20 Gallon (UK) | 20 imperial gallons |
| 25 Gallon (UK) | 25 imperial gallons |
| 50 Gallon (UK) | 50 imperial gallons |
| 100 Gallon (UK) | 100 imperial gallons |
About the Gallon (UK)
Imperial gallon = 4.546 liters. 20% larger than US gallon.
- Symbol
- gal UK
- Value in SI
- 1 Gallon (UK) = 4.54609 litre
- Typical use
- general
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI litre. See our methodology and data provenance pages for how these values are sourced and verified.
Frequently asked
How many imperial gallons are in a Gallon (UK)?
1 Gallon (UK) = 1 imperial gallon. Multiply the number of Gallon (UK) by 1 to get imperial gallons.
What is Gallon (UK) used for?
Imperial gallon = 4.546 liters. 20% larger than US gallon. It is classified as active and dates from the modern period.
Is the Gallon (UK) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI litre, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Gallon (UK) conversion?
Conventional value — The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert Gallon (UK) to imperial gallons. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/gallon-uk-to-imperial-gallon
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