How to convert UK mpg to US mpg
mpg (US) = mpg (UK) × 0.8326741846
One UK mile per gallon equals 0.8326741846 mpg (US), so multiply the value in UK mpg by 0.8326741846. Example: 10 mpg (UK) = 8.326741846 mpg (US).
L/100 km is a consumption figure (lower is better) while km/L and mpg are economy figures (higher is better), so the conversion is an inverse, not a simple multiplication. US and UK mpg differ because the gallons differ.
UK mpg to US mpg conversion table
| UK mpg (mpg (UK)) | US mpg (mpg (US)) |
|---|---|
| 1 mpg (UK) | 0.8326741846 mpg (US) |
| 2 mpg (UK) | 1.665348369 mpg (US) |
| 3 mpg (UK) | 2.498022554 mpg (US) |
| 5 mpg (UK) | 4.163370923 mpg (US) |
| 10 mpg (UK) | 8.326741846 mpg (US) |
| 15 mpg (UK) | 12.49011277 mpg (US) |
| 20 mpg (UK) | 16.65348369 mpg (US) |
| 25 mpg (UK) | 20.81685462 mpg (US) |
| 50 mpg (UK) | 41.63370923 mpg (US) |
| 75 mpg (UK) | 62.45056385 mpg (US) |
| 100 mpg (UK) | 83.26741846 mpg (US) |
| 250 mpg (UK) | 208.1685462 mpg (US) |
| 500 mpg (UK) | 416.3370923 mpg (US) |
| 1,000 mpg (UK) | 832.6741846 mpg (US) |