Convert Miles per Imperial Gallon to Kilometers per Imperial Gallon
Convert Miles per Imperial Gallon (mpg (Imp)) to Kilometers per Imperial Gallon (km/Imp gal) instantly and accurately.
Conversion Formula
km/Imp gal = mpg (Imp) × 0.6213711922
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).
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.
Quick Reference Table
| Miles per Imperial Gallon (mpg (Imp)) | Kilometers per Imperial Gallon (km/Imp gal) |
|---|---|
| 1 mpg (Imp) | 1.60934 km/Imp gal |
| 2 mpg (Imp) | 3.21869 km/Imp gal |
| 5 mpg (Imp) | 8.04672 km/Imp gal |
| 10 mpg (Imp) | 16.0934 km/Imp gal |
| 25 mpg (Imp) | 40.2336 km/Imp gal |
| 50 mpg (Imp) | 80.4672 km/Imp gal |
| 100 mpg (Imp) | 160.934 km/Imp gal |