UnitConMPG to KM/L Converter
Convert miles per gallon to kilometers per liter for vehicle comparisons in Japan, India, and other Asian markets where km/L is the standard fuel economy metric. Both scales measure distance per unit volume.
Formula
Multiply US mpg by 0.425144 to get km/L. To reverse, divide km/L by 0.425144 to get US mpg.
Quick reference
| Miles per Gallon (US) (US mpg) | Kilometer per Liter (km/L) |
|---|---|
| 10 | 4.251437 |
| 15 | 6.377156 |
| 20 | 8.502874 |
| 25 | 10.62859 |
| 30 | 12.75431 |
| 35 | 14.88003 |
| 40 | 17.00575 |
| 45 | 19.13147 |
| 50 | 21.25719 |
| 60 | 25.50862 |
About these units
Miles per Gallon (US)
Miles per gallon is rooted in the US customary system and the specific size of the US gallon. It became the mandated consumer fuel economy metric after the 1973 oil embargo.
Kilometer per Liter
Kilometers per liter is the fuel economy metric in Japan, India, and several other Asian and Latin American countries. It is a direct analogue to mpg — a distance-per-volume measure — making conversion a simple multiplication unlike L/100km.
Frequently asked questions
30 × 0.425144 ≈ 12.75 km/L.
15 ÷ 0.425144 ≈ 35.28 mpg.
It is exactly that: 1.60934 km/mi ÷ 3.78541 L/gal = 0.425144 km/L per mpg.