Convert Imperial Gallons to Gallons
Convert Imperial Gallons (UK gal) to Gallons (gal) instantly and accurately.
Conversion Formula
gal = UK gal × 1.200949926
About Imperial Gallons
A US imperial gallon (UK gal) = exactly 8 imperial pints or 10 lb of pure water at 62°F ≈ 4.546 L - about 20% larger than the US liquid gallon (3.785 L). The weight-based definition made it verifiable with simple scales. Still the legal fuel measure in the Cayman Islands and other British Overseas Territories. UK mpg ratings use imperial gallons: 50 UK mpg ≈ 42 US mpg. 1 UK gal ≈ 4.546 L.
About Gallons
A US gallon (gal) = 4 quarts = 128 fl oz ≈ 3.785 L. Gasoline, milk, water, paint, and pesticides are sold by the gallon in the US. About 20% smaller than the UK imperial gallon (4.546 L) - a critical difference when comparing fuel economy across the Atlantic. 1 US gal = 3.785 L = 4 qt = 128 fl oz.
Quick Reference Table
| Imperial Gallons (UK gal) | Gallons (gal) |
|---|---|
| 1 UK gal | 1.20095 gal |
| 2 UK gal | 2.4019 gal |
| 5 UK gal | 6.00475 gal |
| 10 UK gal | 12.0095 gal |
| 25 UK gal | 30.0237 gal |
| 50 UK gal | 60.0475 gal |
| 100 UK gal | 120.095 gal |