Mpg Uk to Mpg Us Converter
Convert UK MPG to US MPG instantly. Free fuel economy converter for international cars.
Formula
mpg (US) = mpg (UK) × 0.832674
Common Conversions
How to Convert UK MPG to US MPG
Multiply UK MPG by 0.8327 to get US MPG. So 60 UK MPG × 0.8327 = 49.96 US MPG. The conversion comes from the gallon size difference: UK gallon (4.546 L) is bigger than US gallon (3.785 L), so UK MPG numbers are inherently higher than US MPG for the same vehicle.
Useful when comparing UK and US car spec sheets directly. A UK manufacturer claims '50 MPG combined' which is 41.6 US MPG - very different from a US manufacturer's '50 MPG' claim. Always verify which gallon convention is being used. EU CO2 ratings often show g/km, which converts independently.
UK MPG to US MPG
| UK MPG | US MPG |
|---|---|
| 20 | 16.65 |
| 30 | 24.98 |
| 40 | 33.31 |
| 50 | 41.64 |
| 60 | 49.96 |
| 70 | 58.29 |
| 80 | 66.62 |
| 100 | 83.27 |
Frequently Asked Questions
Are these the same gallon?
No - that's the key. UK gallon = 4.546 L; US gallon = 3.785 L. They share the name but are 20% different in size. UK MPG measures more fuel per gallon's worth of distance, so the same car gets a higher UK MPG number than US MPG number.
Why does this matter for car reviews?
Many international car reviews quote MPG without specifying which. A Japanese hybrid at '60 MPG' from a UK reviewer = 50 US MPG (very different impression to a US reader). Watch for context clues: GBP pricing usually means UK MPG; USD pricing usually means US MPG.
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