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· Last updated：2026-06-12
Convert miles per gallon to kilometers per liter with configurable decimal precision
Details
Enter US miles per gallon and convert with 1 mpg = 0.4251437075 km/L.
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
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Tool usage guide
Easily convert US miles per gallon (MPG) to kilometers per liter (KM/L) with this precise online calculator. Simply input your fuel economy value in MPG, set your desired decimal precision, and instantly get the equivalent metric consumption rate based on the standard conversion factor of 1 MPG = 0.4251437075 KM/L.
Background
A buyer is looking at a US import car rated at 30 MPG and wants to know its efficiency in metric units.
Problem
Convert 30 MPG to KM/L with standard 4-digit precision.
How to use
Input 30 in the MPG field and set the decimal precision to 4.
{
"mpg": 30,
"precision": 4
}Outcome
The tool outputs a JSON result showing 12.7543 KM/L.
Background
An analyst is compiling a global fleet efficiency report and needs highly precise conversions for a truck rated at 15 MPG.
Problem
Convert 15 MPG to KM/L with 6 decimal places of precision.
How to use
Enter 15 in the MPG input and change the decimal precision to 6.
{
"mpg": 15,
"precision": 6
}The conversion uses the formula: 1 MPG = 0.4251437075 KM/L.
This tool converts US miles per gallon (MPG) to kilometers per liter.
Yes, you can set the decimal precision anywhere from 0 to 10 decimal places.
No, you can input any positive numerical MPG value to perform the conversion.
The result is returned as a JSON object containing the original MPG and the converted KM/L value.
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Outcome
The tool returns a JSON result showing 6.377156 KM/L.