Miles per US gallon to Miles per UK gallon
Type a value in Miles per US gallon and get the result in Miles per UK gallon, calculated exactly.
30 Miles per US gallon ≈ 36.02849777 Miles per UK gallon
Precision
Exact factorRounded for display to about 10 significant digits.
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Formula
mpg (UK) = mpg (US) × 1.2009499255
To convert Miles per US gallon to Miles per UK gallon, multiply the value by 1.2009499255.
Worked examples
- 1 mpg (US) × 1.2009499255 ≈ 1.200949926 mpg (UK)
- 30 mpg (US) × 1.2009499255 ≈ 36.02849777 mpg (UK)
- 100 mpg (US) × 1.2009499255 ≈ 120.0949926 mpg (UK)
This factor is exact by definition.
Conversion table
| Miles per US gallon (mpg (US)) | Miles per UK gallon (mpg (UK)) |
|---|---|
| 10 | ≈ 12.0095 |
| 15 | ≈ 18.01425 |
| 20 | ≈ 24.019 |
| 25 | ≈ 30.02375 |
| 30 | ≈ 36.0285 |
| 35 | ≈ 42.03325 |
| 40 | ≈ 48.038 |
| 45 | ≈ 54.04275 |
| 50 | ≈ 60.0475 |
| 60 | ≈ 72.057 |
| 70 | ≈ 84.06649 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Miles per UK gallon to Miles per US gallon
| Miles per UK gallon (mpg (UK)) | Miles per US gallon (mpg (US)) |
|---|---|
| 10 | ≈ 8.326742 |
| 15 | ≈ 12.49011 |
| 20 | ≈ 16.65348 |
| 25 | ≈ 20.81685 |
| 30 | ≈ 24.98023 |
| 35 | ≈ 29.1436 |
| 40 | ≈ 33.30697 |
| 45 | ≈ 37.47034 |
| 50 | ≈ 41.63371 |
| 60 | ≈ 49.96045 |
| 70 | ≈ 58.28719 |
Unit definitions
- Miles per US gallon mpg (US)
- Miles travelled per US gallon: about 0.425144 km/L.
- Miles per UK gallon mpg (UK)
- Miles travelled per imperial gallon: about 0.354006 km/L.
Questions people ask
Miles per US gallon to Miles per UK gallon: what is the conversion factor?
One mpg (US) is ≈ 1.200949926 mpg (UK).
How do I convert Miles per US gallon to Miles per UK gallon?
Use the formula above. For example, 30 mpg (US) = ≈ 36.02849777 mpg (UK).
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.