Gallons UK to Gallons US Converter
Instantly convert UK (Imperial) gallons to US (Liquid) gallons and litres. Accurate, free volume calculator for fuel, liquids, and industrial measurements.
Calculate Your Liquid Volume
Enter your volume in UK (Imperial) gallons below to get an instant, precise conversion to US (Liquid) gallons and metric litres.
Volume Converter
Enter the UK gallons to see the US equivalent
Enter your volume measurement in Imperial gallons
Equivalence: 1 UK Gal = 1.20095 US Gal = 4.54609 Litres
Converted Volume
Based on standard international volume conversion factors
UK to US Gallons Reference Chart
Common volume conversions used across fuel, automotive, brewing, and industrial liquid measurement sectors.
| UK Gallons (Imp) | US Gallons (Liquid) | Litres (L) |
|---|---|---|
| 1 | 1.20 | 4.55 |
| 5 | 6.00 | 22.73 |
| 10 | 12.01 | 45.46 |
| 20 | 24.02 | 90.92 |
| 50 | 60.05 | 227.30 |
| 100 | 120.10 | 454.61 |
| 250 | 300.24 | 1,136.52 |
| 500 | 600.48 | 2,273.05 |
Volume Conversion FAQ
Everything you need to know about converting UK gallons to US gallons and understanding liquid volume measurements.
To convert UK (Imperial) gallons to US (Liquid) gallons, multiply the UK gallon value by 1.20095. For example, 10 UK gallons multiplied by 1.20095 equals 12.01 US gallons.
A UK (Imperial) gallon is approximately 20% larger than a US (Liquid) gallon. One UK gallon equals exactly 4.54609 litres, whereas one US gallon equals approximately 3.78541 litres.
There are exactly 4.54609 litres in one UK (Imperial) gallon. This is the standard metric conversion used in the United Kingdom and other countries that historically adopted the Imperial system.
The divergence is historical. The UK standardized the Imperial gallon in 1824 based on the volume of 10 pounds of distilled water at a specific temperature. The US retained the older English ‘wine gallon’ (231 cubic inches), which was in use before the American Revolution.