UK Gallons to US Gallons Converter
Convert UK gallons (UK gal) to US gallons (gal) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
UK Gallons to US Gallons formula
gal = UK gal × 1.20094993
1 UK gallon = 1.2 US gallons · 1 US gallon = 0.8327 UK gallons
To convert UK gallons to US gallons, multiply the value by 1.20094993. For example, 10 UK gal:
gal = 10 × 1.20094993gal = 12.009499
So 10 UK gal = 12.01 gal.
Mental math shortcut
Quick mental estimate: multiply by 1.2. For 10 UK gal that gives about 12 gal — within 1% of the exact answer. Use the exact formula when precision matters.
UK Gallons to US Gallons conversion table
US Gallons back to UK Gallons
The same values converted the other way, rounded for everyday use:
| US gallons | UK gallons |
|---|---|
| 1.2 gal | 0.9992 UK gal |
| 6 gal | 5 UK gal |
| 12.01 gal | 10 UK gal |
| 18.01 gal | 15 UK gal |
| 24.02 gal | 20 UK gal |
| 60.05 gal | 50 UK gal |
| 120.09 gal | 100 UK gal |
About the units
UK gallons (UK gal)
An imperial (UK) gallon is exactly 4.54609 liters — about 20% larger than a US gallon.
US gallons (gal)
A US gallon is 128 US fluid ounces, exactly 3.785411784 liters. (The UK imperial gallon is 4.546 liters.)
Frequently asked questions
How many US gallons are in a UK gallon?
One UK gallon equals 1.2 US gallons.
What is 10 UK Gallons in US Gallons?
10 UK gal = 12.01 gal.
How do I convert US Gallons back to UK Gallons?
Divide the US gallons by 1.20094993. Or use the US Gallons to UK Gallons converter.