mpg-us to mpg-uk | Exact Decimal + Formula
1 Miles per Gallon (US) = 1.20095 Miles per Gallon (UK)
US to UK MPG conversion matters when comparing American and British fuel-economy ratings — the imperial gallon is about 20% larger.
About Miles per Gallon (US) and Miles per Gallon (UK)
Miles per Gallon (US) (mpg (US))
US miles per gallon measures how many miles a vehicle travels per gallon of fuel — higher is better.
Where it's used: EPA fuel-economy ratings in the United States.
Miles per Gallon (UK) (mpg (UK))
UK miles per gallon uses the larger imperial gallon, so the same car shows a higher UK MPG figure.
Where it's used: Official fuel-economy ratings in the United Kingdom.
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Formula
mpg (UK) = mpg (US) × 1
To convert Miles per Gallon (US) to Miles per Gallon (UK), use the formula displayed above.
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Miles per Gallon (US) to Miles per Gallon (UK): Quick Reference Table
| Miles per Gallon (US) | Miles per Gallon (UK) (Decimal) | Fraction |
|---|---|---|
| 0.001 mpg (US) | 0.001201 mpg (UK) | - |
| 0.01 mpg (US) | 0.012009 mpg (UK) | - |
| 0.1 mpg (US) | 0.120095 mpg (UK) | - |
| 0.5 mpg (US) | 0.600475 mpg (UK) | - |
| 1 mpg (US) | 1.20095 mpg (UK) | - |
| 2 mpg (US) | 2.4019 mpg (UK) | - |
| 5 mpg (US) | 6.00475 mpg (UK) | - |
| 10 mpg (US) | 12.009499 mpg (UK) | - |
| 25 mpg (US) | 30.023748 mpg (UK) | - |
| 50 mpg (US) | 60.047496 mpg (UK) | - |
| 100 mpg (US) | 120.094993 mpg (UK) | - |
| 250 mpg (US) | 300.237481 mpg (UK) | - |
| 500 mpg (US) | 600.474963 mpg (UK) | - |
| 1000 mpg (US) | 1200.949926 mpg (UK) | - |
mpg (US) to mpg (UK) Formula and Examples
Direct Formula
mpg (UK) = mpg (US) × 1 Inverse Formula
mpg (US) = mpg (UK) × 0.832674 Mental Math Shortcut
Multiply the value by roughly 1.2 to calculate the equivalent amount in your head.
Common Miles per Gallon (US) to Miles per Gallon (UK) Calculations
- 5 mpg (US) = 6.00475 mpg (UK)
- 10 mpg (US) = 12.009499 mpg (UK)
- 50 mpg (US) = 60.047496 mpg (UK)
- 100 mpg (US) = 120.094993 mpg (UK)
- 500 mpg (US) = 600.474963 mpg (UK)
Precision & Practical Use
For example, 10 mpg (US) = 12.009499 mpg (UK) — roughly multiple unit increments.
Results are computed to up to 9 decimal places. Round to the precision of your measuring instrument — for most fuel consumption applications, 2–3 significant figures are plenty.
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How to Convert Miles per Gallon (US) to Miles per Gallon (UK)
How many miles per gallon (uk)s are in one miles per gallon (us)?
One Miles per Gallon (US) (mpg (US)) equals 1.20095 Miles per Gallon (UK) (mpg (UK)). To convert miles per gallon (us)s to miles per gallon (uk)s, multiply the miles per gallon (us) value by 1.20095.
How do I convert Miles per Gallon (US) to Miles per Gallon (UK)?
Multiply your miles per gallon (us) value by 1.20095 to get the result in Miles per Gallon (UK): mpg (UK) = mpg (US) × 1.20095. For example, 5 mpg (US) = 6.00475 mpg (UK).
What is the formula for converting mpg (US) to mpg (UK)?
The conversion formula is mpg (UK) = mpg (US) × 1.20095. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.
Is there a quick mental estimate for mpg (US) to mpg (UK)?
Multiply the value by roughly 1.2 to calculate the equivalent amount in your head.
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