Is mpg (US) to km/L the same as km/L to mpg (US)?
No. They are inverse operations. For this page, 1 mpg (US) equals 0.4251437075 km/L, while 1 km/L equals 2.352145833 mpg (US).
Fuel Economy
Convert Miles per gallon (US) (mpg (US)) to Kilometer per liter (km/L) instantly.
Formula
value × factor (via km/L base)
| Sample | Converted |
|---|---|
| 5 mpg (US) | 2.1257185375 km/L |
| 10 mpg (US) | 4.251437075 km/L |
| 20 mpg (US) | 8.50287415 km/L |
| 35 mpg (US) | 14.8800297625 km/L |
| 50 mpg (US) | 21.257185375 km/L |
This conversion scales values from a smaller fuel economy unit to a larger one. That usually decreases the numeric value when going from mpg (US) to km/L.
Definition: Miles per gallon (US) (mpg (US)) is a standardized unit used to measure fuel economy.
History/Origin: This unit is part of established international or regional measurement systems and is included in engineering and scientific references.
Current use: This unit appears in real-world fuel economy calculations, technical documentation, and day-to-day conversions.
Definition: Kilometer per liter (km/L) is a standardized unit used to measure fuel economy.
History/Origin: This unit is part of established international or regional measurement systems and is included in engineering and scientific references.
Current use: This unit appears in real-world fuel economy calculations, technical documentation, and day-to-day conversions.
| Miles per gallon (US) [mpg (US)] | Kilometer per liter [km/L] |
|---|---|
| 0.01 mpg (US) | 0.0042514371 km/L |
| 0.1 mpg (US) | 0.0425143708 km/L |
| 1 mpg (US) | 0.4251437075 km/L |
| 2 mpg (US) | 0.850287415 km/L |
| 5 mpg (US) | 2.1257185375 km/L |
| 10 mpg (US) | 4.251437075 km/L |
| 20 mpg (US) | 8.50287415 km/L |
| 50 mpg (US) | 21.257185375 km/L |
| 100 mpg (US) | 42.51437075 km/L |
1 mpg (US) = 0.4251437075 km/L
1 km/L = 2.352145833 mpg (US)
Formula: value × factor (via km/L base)
Example: 15 mpg (US) = 6.3771556125 km/L
No. They are inverse operations. For this page, 1 mpg (US) equals 0.4251437075 km/L, while 1 km/L equals 2.352145833 mpg (US).
Use the factor 0.4251437075 for quick mental math, then refine with the exact calculator result when precision matters.