Convert Imperial Gallons to US Gallons
1 imperial gallon = 1.2009499 us gallons. Multiply the number of imperial gallons by 1.2009499255.
1 gal = 1.200949926 gal
Multiply the number of imperial gallons by 1.2009499255.
Results are rounded for display. Double-check values for critical work.
Imperial Gallons to US Gallons table
| Imperial Gallons | US Gallons |
|---|---|
| 1 gal | 1.2009499 gal |
| 2 gal | 2.4018999 gal |
| 3 gal | 3.6028498 gal |
| 4 gal | 4.8037997 gal |
| 5 gal | 6.0047496 gal |
| 10 gal | 12.009499 gal |
| 20 gal | 24.018999 gal |
| 25 gal | 30.023748 gal |
| 50 gal | 60.047496 gal |
| 100 gal | 120.09499 gal |
| 500 gal | 600.47496 gal |
| 1000 gal | 1,200.9499 gal |
Imperial Gallons to US Gallons in your head
Multiply by 6, then divide by 5.
That lands within 0.1% of the exact value.
10 gal → 12 gal in your head, 12.0095 gal exactly.
About these units
The imperial gallon (gal) is an imperial unit of volume & capacity, equal to 0.00454609 cubic meters.
The us gallon (gal) is a US customary unit of volume & capacity, equal to 0.0037854118 cubic meters.
Going the other way, 1 us gallon = 0.83267418 imperial gallons. A US gallon and an imperial gallon differ by about 20%, and the same is true right down to teaspoons. This converter keeps the two systems separate and explicit so a recipe or a fuel figure never comes out a fifth wrong.
Frequently asked
- How many us gallons are in a imperial gallon?
- 1 imperial gallon = 1.2009499 us gallons.
- How do you convert imperial gallons to us gallons?
- Multiply the number of imperial gallons by 1.2009499255.
- What is 10 gal in gal?
- 10 gal = 12.009499 gal.