Convert Imperial Gallons per Mile to US Gallons per Mile
Convert Imperial Gallons per Mile (Imp gal/mi) to US Gallons per Mile (US gal/mi) instantly and accurately.
Conversion Formula
US gal/mi = Imp gal/mi × 1.200949926
About Imperial Gallons per Mile
Imperial gallons per mile is the British counterpart, using the 4.54609 L Imperial gallon. 1 Imp gal/mi = 4.54609/1.609344 × 100 = 282.481 L/100km - among the largest fuel-consumption values in practical use, representing large vessels and heavy machinery. It appears in older Royal Navy vessel technical logs and historical British railway and steam-locomotive records. As mpg(Imp) and gal/mi are reciprocals, a 50 mpg(Imp) car uses exactly 0.02 Imp gal/mi = 5.650 L/100km. 1 Imp gal/mi = 282.481 L/100km.
About US Gallons per Mile
US gallons per mile is for extreme consumption: 1 US gal/mi = 235.215 L/100km. Only tanks, heavy mining equipment, or large ships fall into even the fractional gal/mi range. A Boeing 787 burns ~3.9 US gal/mi total (0.015 gal/mi per seat at 85% load factor, 257 seats). Commercial aircraft fleet-wide emission intensity is sometimes expressed in gal/mi per departure. Oceangoing vessels historically logged fuel in US gal/mi in American regulatory frameworks. 1 US gal/mi = 235.215 L/100km = 1 mpg(US) ÷ 100.
Quick Reference Table
| Imperial Gallons per Mile (Imp gal/mi) | US Gallons per Mile (US gal/mi) |
|---|---|
| 1 Imp gal/mi | 1.20095 US gal/mi |
| 2 Imp gal/mi | 2.4019 US gal/mi |
| 5 Imp gal/mi | 6.00475 US gal/mi |
| 10 Imp gal/mi | 12.0095 US gal/mi |
| 25 Imp gal/mi | 30.0237 US gal/mi |
| 50 Imp gal/mi | 60.0475 US gal/mi |
| 100 Imp gal/mi | 120.095 US gal/mi |