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.
1 Gallon (UK) = 1 imperial gallon
imperial gallons = Gallon (UK) × 1
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.
Related units and variant risk
Other uk vs us volume units in the Western Europe family, least settled first. If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.
- Gill (UK) to imperial gallonsHistorically reconstructed
- Teaspoon (Metric) to imperial gallonsConventional value
- Tablespoon (Metric) to imperial gallonsConventional value
- Cup (UK/Imperial) to imperial gallonsConventional value
- Cup (Metric) to imperial gallonsConventional value
- Fluid Ounce (UK) to imperial gallonsConventional value
- Gallon (US) to imperial gallonsConventional value
- Pint (UK) to imperial gallonsConventional value
Related conversions
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
Report an incorrect value or source
Regional units vary by district and by century. If this figure, its variant list or its citation is wrong where you are, tell us — the report carries the page context automatically.