Convert Gallon (UK) to US 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) = 1.20095 US gallons
US gallons = Gallon (UK) × 1.2009499
Convert any amount
Gallon (UK) to US gallons table
| Gallon (UK) | US gallons |
|---|---|
| 0.25 Gallon (UK) | 0.300237 US gallons |
| 0.5 Gallon (UK) | 0.600475 US gallons |
| 1 Gallon (UK) | 1.20095 US gallons |
| 2 Gallon (UK) | 2.4019 US gallons |
| 3 Gallon (UK) | 3.60285 US gallons |
| 4 Gallon (UK) | 4.8038 US gallons |
| 5 Gallon (UK) | 6.00475 US gallons |
| 10 Gallon (UK) | 12.0095 US gallons |
| 20 Gallon (UK) | 24.019 US gallons |
| 25 Gallon (UK) | 30.0237 US gallons |
| 50 Gallon (UK) | 60.0475 US gallons |
| 100 Gallon (UK) | 120.095 US 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 If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.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 US gallonsHistorically reconstructed
- Teaspoon (Metric) to US gallonsConventional value
- Tablespoon (Metric) to US gallonsConventional value
- Cup (UK/Imperial) to US gallonsConventional value
- Cup (Metric) to US gallonsConventional value
- Fluid Ounce (UK) to US gallonsConventional value
- Gallon (US) to US gallonsConventional value
- Pint (UK) to US gallonsConventional value
Related conversions
Frequently asked
How many US gallons are in a Gallon (UK)?
1 Gallon (UK) = 1.20095 US gallons. Multiply the number of Gallon (UK) by 1.2009499 to get US 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 US gallons. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/gallon-uk-to-us-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.