Miles per Gallon (US) to Miles per Gallon (Imp) Converter (mpg to mpg (imp))
1 miles per gallon (us) = 1.20095 miles per gallon (imp). The UK imperial gallon (4.546 L) is larger than the US gallon (3.785 L), so a car gets more imperial mpg than US mpg: 1 imperial mpg is 0.8327 US mpg.
Result
35 mpg = 42.033299 mpg (imp)
How to convert miles per gallon (us) to miles per gallon (imp)
The UK imperial gallon (4.546 L) is larger than the US gallon (3.785 L), so a car gets more imperial mpg than US mpg: 1 imperial mpg is 0.8327 US mpg. UK car adverts use imperial mpg.
Formula
mpg (imp) = mpg × 1.20095
Worked example
35 mpg × 1.20095 = 42.0333 mpg (imp)
Miles per Gallon (US) to Miles per Gallon (Imp) quick-reference table
| Miles per Gallon (US) (mpg) | Miles per Gallon (Imp) (mpg (imp)) |
|---|---|
| 20 mpg | 24.019 mpg (imp) |
| 30 mpg | 36.0285 mpg (imp) |
| 40 mpg | 48.0381 mpg (imp) |
| 50 mpg | 60.0476 mpg (imp) |
| 60 mpg | 72.0571 mpg (imp) |
| 70 mpg | 84.0666 mpg (imp) |
Real-life examples
A US car rated at 35 mpg gets 42 mpg (imp), which is how a UK buyer would see it.
Frequently asked questions
Why does a UK mpg look higher?
The imperial gallon is 20 percent bigger than the US gallon, so the same car covers more miles per gallon.
How do I convert UK mpg to US mpg?
Multiply by 0.8327: 50 UK mpg is 41.6 US mpg.
What is 1 miles per gallon (us) in miles per gallon (imp)?
1 miles per gallon (us) = 1.20095 miles per gallon (imp) (mpg to mpg (imp)).
What is the formula to convert mpg to mpg (imp)?
mpg (imp) = mpg × 1.20095. For example, 35 mpg × 1.20095 = 42.0333 mpg (imp).
How do I convert mpg (imp) back to mpg?
Use the reverse converter: 1 miles per gallon (imp) = 0.832673 miles per gallon (us). Check: 42.0333 mpg (imp) converts back to 35 mpg.
Reverse conversion
Need the other direction? Miles per Gallon (Imp) to Miles per Gallon (US) converter (mpg (imp) to mpg): 1 miles per gallon (imp) = 0.832673 miles per gallon (us).
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