Fuel Economy converter
MPG (US) to MPG (UK) Converter
Convert miles per US gallon to miles per Imperial gallon for cross-Atlantic fuel economy comparisons.
Result
1 mpg = 1.20095 mpg (UK)
Also equals
Conversion formula
mpg (UK) = mpg (US) × 1.2009530 mpg (US) equals approximately 36.03 mpg (UK).
Miles per Gallon (US) to Miles per Gallon (UK) table
| Miles per Gallon (US) (mpg) | Miles per Gallon (UK) (mpg (UK)) |
|---|---|
| 0.01 | 0.012 |
| 0.1 | 0.1201 |
| 1 | 1.201 |
| 2 | 2.4019 |
| 3 | 3.6029 |
| 5 | 6.0048 |
| 10 | 12.0095 |
| 20 | 24.019 |
| 50 | 60.0475 |
| 100 | 120.095 |
| 1,000 | 1,200.95 |
What is Miles per Gallon (US) to Miles per Gallon (UK)?
Converting miles per gallon (US) to miles per gallon (UK) is necessary because the two countries use different gallon sizes. One US gallon is 3.785 liters and one UK gallon is 4.546 liters. The formula is UK mpg = US mpg × 1.20095.
About this conversion
This converter uses the displayed definition for miles per gallon (us) and its recognized relationship to miles per gallon (uk). Calculations retain full precision internally, and only the visible result is rounded. You can swap the conversion direction without changing the underlying standard.
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When to convert US MPG to UK MPG
Use this conversion when comparing US and UK vehicle specs, reading cross-border car reviews, or converting published ratings.
Frequently asked questions
Why are US and UK MPG different?+
A US gallon (3.785 L) is smaller than an Imperial gallon (4.546 L), so the same vehicle gets a higher mpg number in the UK.
What is the conversion factor?+
Multiply US mpg by 1.20095 to get UK mpg, since 1 Imp gal ÷ 1 US gal ≈ 1.20095.
How many UK mpg is 30 US mpg?+
30 US mpg is about 36.03 UK mpg.
Why is UK MPG always higher?+
The UK gallon is larger than the US gallon, so the same distance uses fewer gallons when measured in UK gallons.
What is the conversion factor?+
Multiply US mpg by 1.20095 to get UK mpg.
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