Convert Miles per US Gallon to Kilometers per Imperial Gallon
Convert Miles per US Gallon (mpg (US)) to Kilometers per Imperial Gallon (km/Imp gal) instantly and accurately.
Conversion Formula
km/Imp gal = mpg (US) × 0.5173997508
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.
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 US Gallon (mpg (US)) | Kilometers per Imperial Gallon (km/Imp gal) |
|---|---|
| 1 mpg (US) | 1.93274 km/Imp gal |
| 2 mpg (US) | 3.86548 km/Imp gal |
| 5 mpg (US) | 9.66371 km/Imp gal |
| 10 mpg (US) | 19.3274 km/Imp gal |
| 25 mpg (US) | 48.3185 km/Imp gal |
| 50 mpg (US) | 96.6371 km/Imp gal |
| 100 mpg (US) | 193.274 km/Imp gal |