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Fuel Economy
Miles per gallon (US) to Miles per gallon (UK)
Convert miles per gallon (US) (mpg (US)) to miles per gallon (UK) (mpg (UK)). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 mpg (US) = 1.201 mpg (UK)
Miles per gallon (US) to Miles per gallon (UK) Conversion Table
Common values, ready to copy:
| miles per gallon (US) | miles per gallon (UK) |
|---|---|
| 1 mpg (US) | 1.201 mpg (UK) |
| 2 mpg (US) | 2.4019 mpg (UK) |
| 5 mpg (US) | 6.0048 mpg (UK) |
| 10 mpg (US) | 12.0095 mpg (UK) |
| 25 mpg (US) | 30.0238 mpg (UK) |
| 50 mpg (US) | 60.0475 mpg (UK) |
| 100 mpg (US) | 120.1 mpg (UK) |
| 1,000 mpg (US) | 1200.95 mpg (UK) |
Formula
mpg(UK) = mpg(US) × 1.20095
Fuel economy can be expressed as distance per unit fuel (mpg, km/L, higher is better) or fuel per unit distance (L/100km, lower is better). They convert via inverse: mpg(US) × L/100km = 235.2146.
About Miles per gallon (US) and Miles per gallon (UK)
Miles per gallon (US) (mpg (US)): Distance per US gallon of fuel; the US standard for fuel economy. Common uses: US vehicle window stickers (EPA-rated mpg), US car reviews, and US fleet fuel economy.
Miles per gallon (UK) (mpg (UK)): Distance per UK imperial gallon (4.546 L, about 20% larger than the US gallon); the UK historically uses the imperial gallon, so UK mpg numbers look higher than US numbers for the same car. Common uses: UK vehicle specifications, UK car reviews, and historical British data.
How the conversion works
Fuel economy can be expressed as distance per unit fuel (mpg, km/L, higher is better) or fuel per unit distance (L/100km, lower is better). They convert via inverse: mpg(US) × L/100km = 235.2146.
The exact relationship is mpg(UK) = mpg(US) × 1.20095, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between miles per gallon (US) and miles per gallon (UK) comes up wherever fuel economy measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.