Home› Conversions› Fuel Economy› Miles per gallon (UK) to Miles per gallon (US)
Fuel Economy
Miles per gallon (UK) to Miles per gallon (US)
Convert miles per gallon (UK) (mpg (UK)) to miles per gallon (US) (mpg (US)). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 mpg (UK) = 0.832674 mpg (US)
Miles per gallon (UK) to Miles per gallon (US) Conversion Table
Common values, ready to copy:
| miles per gallon (UK) | miles per gallon (US) |
|---|---|
| 1 mpg (UK) | 0.832674 mpg (US) |
| 2 mpg (UK) | 1.6653 mpg (US) |
| 5 mpg (UK) | 4.1634 mpg (US) |
| 10 mpg (UK) | 8.3267 mpg (US) |
| 25 mpg (UK) | 20.8168 mpg (US) |
| 50 mpg (UK) | 41.6337 mpg (US) |
| 100 mpg (UK) | 83.2674 mpg (US) |
| 1,000 mpg (UK) | 832.67 mpg (US) |
Formula
mpg(US) = mpg(UK) × 0.83267
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 (UK) and Miles per gallon (US)
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.
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.
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(US) = mpg(UK) × 0.83267, 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 (UK) and miles per gallon (US) 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.