How to convert US mpg to kilometers per liter
km/L = mpg (US) × 0.4251437074
One US mile per gallon equals 0.4251437074 km/L, so multiply the value in US mpg by 0.4251437074. Example: 10 mpg (US) = 4.251437074 km/L.
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.
US mpg to kilometers per liter conversion table
| US mpg (mpg (US)) | Kilometers per liter (km/L) |
|---|---|
| 1 mpg (US) | 0.4251437074 km/L |
| 2 mpg (US) | 0.8502874149 km/L |
| 3 mpg (US) | 1.275431122 km/L |
| 5 mpg (US) | 2.125718537 km/L |
| 10 mpg (US) | 4.251437074 km/L |
| 15 mpg (US) | 6.377155611 km/L |
| 20 mpg (US) | 8.502874149 km/L |
| 25 mpg (US) | 10.62859269 km/L |
| 50 mpg (US) | 21.25718537 km/L |
| 75 mpg (US) | 31.88577806 km/L |
| 100 mpg (US) | 42.51437074 km/L |
| 250 mpg (US) | 106.2859269 km/L |
| 500 mpg (US) | 212.5718537 km/L |
| 1,000 mpg (US) | 425.1437074 km/L |