Convert MPG (US) to km/L instantly — enter a value in either field.
| MPG (US) (mpg (US)) | km/L (km/L) |
|---|---|
| 15 mpg (US) | 6.38 km/L |
| 20 mpg (US) | 8.5 km/L |
| 25 mpg (US) | 10.63 km/L |
| 30 mpg (US) | 12.75 km/L |
| 35 mpg (US) | 14.88 km/L |
| 40 mpg (US) | 17.01 km/L |
| 45 mpg (US) | 19.13 km/L |
| 50 mpg (US) | 21.26 km/L |
| 55 mpg (US) | 23.38 km/L |
| 60 mpg (US) | 25.51 km/L |
Example: 30 mpg (US) → 30 × 0.425144 = 12.75 km/L
Comparing US fuel economy with Asian-market specifications often means converting between mpg and km/L. Since both are range-per-unit-fuel (higher is better), this conversion is a direct multiplication: km/L = mpg (US) × 0.425144, derived from 1.609344 km/mi ÷ 3.785411784 L/gal.
A 30-mpg US car gets 12.75 km/L; a 50-mpg hybrid delivers 21.26 km/L. Unlike the L/100km conversion, this is a linear relationship — doubling mpg doubles km/L — because both units share the same “more is better” direction.
This page uses US gallons (3.785 L). UK mpg uses the imperial gallon (4.546 L), so a British 30-mpg figure corresponds to about 10.6 km/L rather than 12.75. When comparing cars sold in both US and UK markets, always verify which gallon the manufacturer used.
35 × 0.425144 = 14.88 km/L. The factor is 1.609344 km/mi ÷ 3.785411784 L/gal.
Yes. Both mpg and km/L are range units (higher = better), so their relationship is a direct proportion. Doubling mpg doubles km/L.
US gallons. To convert UK mpg to km/L, multiply by 0.354 instead of 0.425.