Miles per US Gallon to Miles per Imperial Gallon Converter
1 mile per US gallon ≈ 1.20094993 miles per imperial gallon
US mpg figures are about 17% lower than imperial mpg for the same car, because the US gallon is smaller.
1 mile per US gallon equals 1.20095 miles per imperial gallon
How to convert miles per US gallon to miles per imperial gallon
Distance per fuel (mpg or km/L) increases with economy; fuel per distance (L/100 km) decreases. Converting between these forms is reciprocal, requires a positive value and depends on whether a gallon is US or Imperial.
mpg (imp) = mpg (US) × 1.200949926One mile per US gallon is 1.200949926 miles per imperial gallon, so a single multiplication converts any value.
12.0095 mpg (imp) ≈ 10 × 1.200949926US mpg figures are about 17% lower than imperial mpg for the same car, because the US gallon is smaller.
Miles per US gallon to miles per imperial gallon conversion table
Common values in miles per US gallon, converted to miles per imperial gallon.
| Miles per US gallon (mpg (US)) | Miles per imperial gallon (mpg (imp)) |
|---|---|
| 10 | 12.009499 |
| 15 | 18.014249 |
| 20 | 24.018999 |
| 25 | 30.023748 |
| 30 | 36.028498 |
| 35 | 42.033247 |
| 40 | 48.037997 |
| 50 | 60.047496 |
| 60 | 72.056996 |
About these units
mile per US gallonmpg (US)
Distance per US gallon. The US fuel-economy standard.
mile per imperial gallonmpg (imp)
Distance per imperial gallon. The UK fuel-economy standard.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.