1 Imperial gallon to US gallons
1 imp gal = 1.20095 gal. Change the amount below, or read the formula and the reference table further down.
1 Imperial gallon equals
US gallons
1 imp gal = 1.20095 gal
The formula
Imperial gallons and US gallons both measure volume from the same zero, so a single multiplier does the job.
gal = imp gal × 1.20094993
Going the other way? Convert US gallons to Imperial gallons.
Imperial gallons to US gallons table
Values either side of 1 imp gal.
| Imperial gallons (imp gal) | US gallons (gal) |
|---|---|
| -4 | -4.8038 |
| -3.5 | -4.2033 |
| -3 | -3.6028 |
| -2.5 | -3.0024 |
| -2 | -2.4019 |
| -1.5 | -1.8014 |
| -1 | -1.2009 |
| -0.5 | -0.600475 |
| 0 | 0 |
| 0.5 | 0.600475 |
| 1 | 1.2009 |
| 1.5 | 1.8014 |
| 2 | 2.4019 |
| 2.5 | 3.0024 |
| 3 | 3.6028 |
| 3.5 | 4.2033 |
| 4 | 4.8038 |
| 4.5 | 5.4043 |
| 5 | 6.0047 |
| 5.5 | 6.6052 |
| 6 | 7.2057 |
Questions people ask
- How many US gallons are in a Imperial gallon?
- One Imperial gallon equals 1.20094993 US gallons.
- How do I convert Imperial gallons to US gallons by hand?
- Multiply the number of Imperial gallons by 1.20094993. For a rough check, 1.2 is close enough for most everyday use.
- What is 1 Imperial gallon in US gallons?
- 1 Imperial gallon is 1.20095 US gallons.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.