Miles per US gallon to kilometers per liter
Type a value in miles per US gallon to see it in kilometers per liter straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the miles per US gallon box.
- Read the result in kilometers per liter as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
km/L = mpg (US) × 0.4251437074
Multiply the value in miles per US gallon by 0.4251437074 to get kilometers per liter.
Example
To convert 25 mpg (US) to kilometers per liter: 25 × 0.4251437074 = 10.6286 km/L.
Conversion table
| Miles per US gallon (mpg (US)) | Kilometers per liter (km/L) |
|---|---|
| 1 | 0.425144 |
| 2 | 0.850287 |
| 3 | 1.27543 |
| 5 | 2.12572 |
| 10 | 4.25144 |
| 20 | 8.50287 |
| 25 | 10.6286 |
| 50 | 21.2572 |
| 100 | 42.5144 |
| 250 | 106.286 |
| 500 | 212.572 |
| 1,000 | 425.144 |
About the units
- Mile per US gallon
- Miles traveled on one US gallon of 3.785411784 liters, the standard in the United States. One mile is exactly 1.609344 km.
- Kilometer per liter
- The number of kilometers a vehicle travels on one liter of fuel. A higher number means better economy.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many kilometers per liter are in one mile per US gallon?
1 mpg (US) = 0.425144 km/L exactly.
How do I convert miles per US gallon to kilometers per liter?
Use km/L = mpg (US) × 0.4251437074. For example, 25 mpg (US) = 10.6286 km/L.
How many miles per US gallon are in one kilometer per liter?
1 km/L = 2.35215 mpg (US).
Why is mpg to L/100 km not a simple multiplication?
The units are reciprocal: one is distance per fuel, the other fuel per distance. You divide about 235.215 by the US mpg value, so 30 mpg is about 7.84 L/100 km.
Why do US and UK mpg differ?
The imperial gallon is 4.54609 L and the US gallon is 3.785411784 L, so the same car shows about 20% more miles per gallon in UK figures.