Convert mpg to mpg (UK)
miles per US gallon to miles per imperial gallon. Enter a value to convert, or use the mpg to mpg (UK) chart further down the page.
1 mile per US gallon equals 1.20095 miles per imperial gallon. Going the other way, 1 mile per imperial gallon = 0.832674 miles per US gallon.
Note. L/100km is an inverse measure — a lower number means better economy — so converting to or from it uses a reciprocal, not a multiplication.
How to convert mpg to mpg (UK)
To convert miles per US gallon to miles per imperial gallon, multiply the mile per US gallon value by 1.200949926. You can also divide by 0.8326741846 to get the same answer.
MPG (UK) = MPG (US) × 1.200949926
Worked example
Convert 30 MPG (US) to miles per imperial gallon:
30 MPG (US) = 36.0285 MPG (UK)
mpg to mpg (UK) conversion chart
Use this mpg to mpg (UK) table for quick reference without typing anything.
| miles per US gallon (MPG (US)) | miles per imperial gallon (MPG (UK)) |
|---|---|
| 5 MPG (US) | 6.00475 MPG (UK) |
| 10 MPG (US) | 12.0095 MPG (UK) |
| 15 MPG (US) | 18.0142 MPG (UK) |
| 20 MPG (US) | 24.019 MPG (UK) |
| 25 MPG (US) | 30.0237 MPG (UK) |
| 30 MPG (US) | 36.0285 MPG (UK) |
| 35 MPG (US) | 42.0332 MPG (UK) |
| 40 MPG (US) | 48.038 MPG (UK) |
| 50 MPG (US) | 60.0475 MPG (UK) |
| 60 MPG (US) | 72.057 MPG (UK) |
What is a mile per US gallon?
Miles per US gallon is the fuel economy figure used on American window stickers. A US gallon is smaller than an imperial gallon, so US MPG figures are about 17% lower than UK MPG for the same car.
What is a mile per imperial gallon?
Miles per imperial gallon is the figure quoted in the UK. The imperial gallon is 4.54609 litres, about 20% larger than the US gallon.
Frequently asked questions
How many mpg (UK) are in a mile per US gallon?
1 mpg equals 1.20095 mpg (UK). Going the other way, 1 mpg (UK) is 0.832674 mpg.
How do you convert mpg to mpg (UK)?
To convert miles per US gallon to miles per imperial gallon, multiply the mile per US gallon value by 1.200949926. You can also divide by 0.8326741846 to get the same answer.
What is 10 mpg in mpg (UK)?
10 mpg equals 12.0095 mpg (UK). The conversion chart on this page lists the other values people look up most often.
Related fuel economy conversions
Convert mpg to other units
Convert other units to mpg (UK)
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