Miles per Imperial Gallon to Miles per US Gallon Converter
1 mile per imperial gallon ≈ 0.832674185 miles per US gallon
US mpg figures are about 17% lower than imperial mpg for the same car, because the US gallon is smaller.
1 mile per imperial gallon equals 0.832674 miles per US gallon
How to convert miles per imperial gallon to miles per US 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 (US) = mpg (imp) × 0.8326741846One mile per imperial gallon is 0.8326741846 miles per US gallon, so a single multiplication converts any value.
8.32674 mpg (US) ≈ 10 × 0.8326741846US mpg figures are about 17% lower than imperial mpg for the same car, because the US gallon is smaller.
Miles per imperial gallon to miles per US gallon conversion table
Common values in miles per imperial gallon, converted to miles per US gallon.
| Miles per imperial gallon (mpg (imp)) | Miles per US gallon (mpg (US)) |
|---|---|
| 10 | 8.3267418 |
| 15 | 12.490113 |
| 20 | 16.653484 |
| 25 | 20.816855 |
| 30 | 24.980226 |
| 35 | 29.143596 |
| 40 | 33.306967 |
| 50 | 41.633709 |
| 60 | 49.960451 |
About these units
mile per imperial gallonmpg (imp)
Distance per imperial gallon. The UK fuel-economy standard.
mile per US gallonmpg (US)
Distance per US gallon. The US 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.