Convert imperial gallon to US gallon
1 imp gal = 1.200949926 gal
1 imp gal = 1.2 gal
1 imp gal in every volume unit
| milliliter | 4,550 mL |
| centiliter | 455 cL |
| liter | 4.55 L |
| cubic meter | 0.00455 m³ |
| cubic inch | 277 in³ |
| cubic foot | 0.161 ft³ |
| US fluid ounce | 154 fl oz |
| US pint | 9.61 pt |
| US quart | 4.8 qt |
| US gallon | 1.2 gal |
| imperial gallon | 1 imp gal |
| cubic yard | 0.00595 yd³ |
| acre-foot | 0.00000369 ac·ft |
How the conversion works
Multiply by 1.200949926 to go from imperial gallon to US gallon, or divide by it to go back. Every conversion on this site routes through the SI value (m³) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? US gallon to imperial gallon — 1 gal = 0.8326741846 imp gal.
imperial gallon to US gallon — common values
| 1 imp gal | 1.2009499 gal |
| 2 imp gal | 2.4018999 gal |
| 3 imp gal | 3.6028498 gal |
| 5 imp gal | 6.0047496 gal |
| 10 imp gal | 12.009499 gal |
| 15 imp gal | 18.014249 gal |
| 20 imp gal | 24.018999 gal |
| 25 imp gal | 30.023748 gal |
| 50 imp gal | 60.047496 gal |
| 75 imp gal | 90.071244 gal |
| 100 imp gal | 120.09499 gal |
| 250 imp gal | 300.23748 gal |
| 500 imp gal | 600.47496 gal |
| 1000 imp gal | 1,200.9499 gal |
Other volume conversions
mL → galL → galm³ → galimp gal → mLimp gal → Limp gal → m³imp gal → qtimp gal → ptSolvers that use volume