1 US gallon to Imperial gallons
1 gal = 0.83267418 imp gal. Change the amount below, or read the formula and the reference table further down.
1 US gallon equals
Imperial gallons
1 gal = 0.83267418 imp gal
The formula
US gallons and Imperial gallons both measure volume from the same zero, so a single multiplier does the job.
imp gal = gal × 0.8326741846
Going the other way? Convert Imperial gallons to US gallons.
US gallons to Imperial gallons table
Values either side of 1 gal.
| US gallons (gal) | Imperial gallons (imp gal) |
|---|---|
| -4 | -3.3307 |
| -3.5 | -2.9144 |
| -3 | -2.498 |
| -2.5 | -2.0817 |
| -2 | -1.6653 |
| -1.5 | -1.249 |
| -1 | -0.832674 |
| -0.5 | -0.416337 |
| 0 | 0 |
| 0.5 | 0.416337 |
| 1 | 0.832674 |
| 1.5 | 1.249 |
| 2 | 1.6653 |
| 2.5 | 2.0817 |
| 3 | 2.498 |
| 3.5 | 2.9144 |
| 4 | 3.3307 |
| 4.5 | 3.747 |
| 5 | 4.1634 |
| 5.5 | 4.5797 |
| 6 | 4.996 |
Questions people ask
- How many Imperial gallons are in a US gallon?
- One US gallon equals 0.8326741846 Imperial gallons.
- How do I convert US gallons to Imperial gallons by hand?
- Multiply the number of US gallons by 0.8326741846. For a rough check, 0.833 is close enough for most everyday use.
- What is 1 US gallon in Imperial gallons?
- 1 US gallon is 0.83267418 Imperial gallons.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.