Convert US gallons 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
Common values, rounded for reading.
| US gallons (gal) | Imperial gallons (imp gal) |
|---|---|
| 1 | 0.832674 |
| 2 | 1.6653 |
| 3 | 2.498 |
| 4 | 3.3307 |
| 5 | 4.1634 |
| 6 | 4.996 |
| 7 | 5.8287 |
| 8 | 6.6614 |
| 9 | 7.4941 |
| 10 | 8.3267 |
| 15 | 12.4901 |
| 20 | 16.6535 |
| 25 | 20.8169 |
| 30 | 24.9802 |
| 40 | 33.307 |
| 50 | 41.6337 |
| 75 | 62.4506 |
| 100 | 83.2674 |
| 250 | 208.17 |
| 500 | 416.34 |
| 1,000 | 832.67 |
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.