Convert Kilometers per Imperial Gallon to Miles per US Gallon
Convert Kilometers per Imperial Gallon (km/Imp gal) to Miles per US Gallon (mpg (US)) instantly and accurately.
Conversion Formula
mpg (US) = km/Imp gal × 1.932741557
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 US Gallon
Miles per US gallon (mpg(US)) is the US and Canadian standard, displayed on every EPA Monroney sticker and used in CAFE regulations. The US gallon = 3.785411784 L; 1 mile = 1.609344 km. 2026 CAFE passenger car standard: ~49 mpg. Toyota Prius Prime: 52 mpg; Tesla Model 3: 132 MPGe. Historical: Ford Model T 21-25 mpg; 1973 US full-size cars 10-15 mpg. NASCAR at race speed: 4-5 mpg; Class 8 semi: 5-8 mpg. L/100km = 235.21458/mpg(US): 30 mpg = 7.84 L/100km; 50 mpg = 4.71 L/100km.
Quick Reference Table
| Kilometers per Imperial Gallon (km/Imp gal) | Miles per US Gallon (mpg (US)) |
|---|---|
| 1 km/Imp gal | 0.5174 mpg (US) |
| 2 km/Imp gal | 1.0348 mpg (US) |
| 5 km/Imp gal | 2.587 mpg (US) |
| 10 km/Imp gal | 5.174 mpg (US) |
| 25 km/Imp gal | 12.935 mpg (US) |
| 50 km/Imp gal | 25.87 mpg (US) |
| 100 km/Imp gal | 51.74 mpg (US) |