Convert US gallons to imperial gallons
1 US gallon = 0.832674 imperial gallons · imp gal = gal ÷ 1.200949926
When you need this conversion
This conversion goes from US gallons, the fuel and liquid volume unit in the US, to imperial gallons, the UK volume unit about 20 percent larger than a US gallon. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.
US gallons to imperial gallons conversion table
| US gallons (gal) | Imperial gallons (imp gal) |
|---|---|
| 1 gal | 0.832674 imp gal |
| 2 gal | 1.6653 imp gal |
| 3 gal | 2.498 imp gal |
| 5 gal | 4.1634 imp gal |
| 10 gal | 8.3267 imp gal |
| 15 gal | 12.4901 imp gal |
| 20 gal | 16.6535 imp gal |
| 25 gal | 20.8169 imp gal |
| 50 gal | 41.6337 imp gal |
| 75 gal | 62.4506 imp gal |
| 100 gal | 83.2674 imp gal |
| 250 gal | 208.17 imp gal |
| 500 gal | 416.34 imp gal |
| 1,000 gal | 832.67 imp gal |
The formula
imp gal = gal ÷ 1.200949926Because both units measure volume, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Imperial gallons to US gallons →Related volume conversions
- US gallons to liters
- Milliliters to US cups
- Milliliters to US fluid ounces
- Liters to cubic meters
- Liters to US gallons
- Cubic meters to liters
- Cubic meters to cubic feet
- Cubic feet to cubic meters
- US cups to milliliters
- US fluid ounces to milliliters
- Milliliters to imperial gallons
- Liters to imperial gallons
Frequently asked questions
- How many imperial gallons are in a US gallon?
- There are 0.832674 imperial gallons in 1 US gallon. The formula is imp gal = gal ÷ 1.200949926.
- How do you convert US gallons to imperial gallons?
- Use the formula imp gal = gal ÷ 1.200949926. For example, 10 US gallons equals 8.3267 imperial gallons.
- Is the US gallons to imperial gallons conversion exact?
- Yes. US gallons and imperial gallons are both units of volume, related by an exact defined factor. Displayed results are rounded for readability.
- What is gal short for?
- gal is the standard symbol for US gallon (also written as gallons). imp gal is the symbol for imperial gallon.