Miles per gallon (mpg) to Kilometers per liter (km/L) Conversion
Miles per gallon
Miles per gallon (mpg) is the US customary measure of fuel economy, expressing how many miles a vehicle can travel on one US gallon (3.785 L) of fuel. Higher values indicate greater efficiency. It is the official fuel economy standard in the United States and is published on all new vehicle window stickers (Monroney labels) under EPA ratings. To convert US mpg to litres per 100 km, divide 235.215 by the mpg value — so 30 mpg equals approximately 7.84 L/100km. US mpg should not be confused with UK mpg, which uses the larger imperial gallon and produces higher numbers for the same vehicle.
Kilometers per liter
Kilometres per litre (km/L) is the metric efficiency-based fuel economy measure used primarily in Japan, India, Latin America, and parts of Asia. Like mpg, higher values indicate greater efficiency — it is the metric analogue of miles per gallon. One km/L equals approximately 2.825 mpg (US) and is inversely related to L/100km: km/L = 100 ÷ L/100km. A Japanese kei car rated at 20 km/L achieves approximately 47 US mpg or 5 L/100km. The km/L unit is used in Japanese JC08 and WLTC fuel economy certification cycles.
| Miles per gallon (mpg) | Kilometers per liter (km/L) |
|---|---|
| 0.1 mpg | 0.0425 km/L |
| 1 mpg | 0.4251 km/L |
| 2 mpg | 0.8503 km/L |
| 3 mpg | 1.2754 km/L |
| 5 mpg | 2.1257 km/L |
| 10 mpg | 4.2514 km/L |
| 20 mpg | 8.5029 km/L |
| 30 mpg | 12.7543 km/L |
| 50 mpg | 21.2572 km/L |
| 100 mpg | 42.5144 km/L |
| 1000 mpg | 425.1437 km/L |
Frequently Asked Questions (FAQ)
How many kilometers per liter are in 1 miles per gallon?
1 miles per gallon (mpg) is exactly 0.425144 kilometers per liter (km/L).
How do I convert miles per gallon to kilometers per liter?
Multiply the value in miles per gallon by 0.425144 to get the result in kilometers per liter. Or use the converter above — type any number and see the result instantly.