Convert Kilometers per Imperial Gallon to Miles per Imperial Gallon
Convert Kilometers per Imperial Gallon (km/Imp gal) to Miles per Imperial Gallon (mpg (Imp)) instantly and accurately.
Conversion Formula
mpg (Imp) = km/Imp gal × 1.609344
About Kilometers per Imperial Gallon
Kilometers per Imperial gallon (km/Imp gal) combines metric distances with the British Imperial gallon (4.54609 L). 1 km/Imp gal = 1/4.54609 km/L = 0.21997 km/L. A typical mid-size car at 12.75 km/L = 57.96 km/Imp gal. It appears in pre-1970s Australian road transport regulations, some South African vehicle import documentation, and pre-1979 Canadian fuel efficiency standards. Relationship to mpg(Imp): km/Imp gal = mpg(Imp) / 1.609344, so 50 mpg(Imp) = 31.07 km/Imp gal. 1 km/Imp gal = 0.21997 km/L.
About Miles per Imperial Gallon
Miles per Imperial gallon (mpg(Imp)) is the UK and historically Commonwealth standard. The Imperial gallon (4.54609 L) is ~20.1% larger than the US gallon, so mpg(Imp) is always numerically higher: a 7 L/100km car achieves 33.6 mpg(US) but 40.4 mpg(Imp). All UK VCA-certified specs list mpg(Imp). Typical WLTP combined: supermini 45-60 mpg; full hybrid 55-75 mpg; diesel family car 48-68 mpg; large petrol SUV 28-38 mpg. 1 mpg(Imp) = 1.609344/4.54609 km/L = 0.354006 km/L; L/100km = 282.481/mpg(Imp).
Quick Reference Table
| Kilometers per Imperial Gallon (km/Imp gal) | Miles per Imperial Gallon (mpg (Imp)) |
|---|---|
| 1 km/Imp gal | 0.621371 mpg (Imp) |
| 2 km/Imp gal | 1.24274 mpg (Imp) |
| 5 km/Imp gal | 3.10686 mpg (Imp) |
| 10 km/Imp gal | 6.21371 mpg (Imp) |
| 25 km/Imp gal | 15.5343 mpg (Imp) |
| 50 km/Imp gal | 31.0686 mpg (Imp) |
| 100 km/Imp gal | 62.1371 mpg (Imp) |