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MPG to km/L Converter

1 mpg (US) = 0.4251437074 km/L. Type any value to convert MPG to km/L.

1 mpg (US) = 0.4251437074 km/L

Formula: km/L = mpg (US) × 0.4251437074

Common values
Decimals
In every unit 6 units
Liter per 100 km (L/100 km) 235.2145833 L/100 km
Kilometer per liter (km/L) 0.4251437074 km/L
Mile per gallon (US) (mpg (US)) 1 mpg (US)
Mile per gallon (UK) (mpg (UK)) 1.200949926 mpg (UK)
Mile per liter (mi/L) 0.2641720524 mi/L
Liter per 100 miles (L/100 mi) 378.5411784 L/100 mi

Convert on our server?

If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 6 hours so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Calculated in your browser – nothing you type is sent anywhere. Privacy details

MPG to km/L table

Formula: km/L = mpg (US) × 0.4251437074

Mile per gallon (US) (mpg (US))Kilometer per liter (km/L)
3 mpg (US)1.275431122 km/L
4 mpg (US)1.70057483 km/L
4.5 mpg (US)1.913146683 km/L
5 mpg (US)2.125718537 km/L
5.5 mpg (US)2.338290391 km/L
6 mpg (US)2.550862245 km/L
6.5 mpg (US)2.763434098 km/L
7 mpg (US)2.976005952 km/L
7.5 mpg (US)3.188577806 km/L
8 mpg (US)3.401149659 km/L
9 mpg (US)3.826293367 km/L
10 mpg (US)4.251437074 km/L
12 mpg (US)5.101724489 km/L
15 mpg (US)6.377155611 km/L
20 mpg (US)8.502874149 km/L
25 mpg (US)10.62859269 km/L
30 mpg (US)12.75431122 km/L
35 mpg (US)14.88002976 km/L
40 mpg (US)17.0057483 km/L
50 mpg (US)21.25718537 km/L

How to use: MPG to km/L

  1. 1 Type the value in MPG.
  2. 2 The result in km/L appears at once – or type in the km/L field to convert back.
  3. 3 Pick a common value, round to fewer decimals or swap the units with one click.
  4. 4 Copy the result, or open “In every unit” to see the value in all units of fuel economy.

About this tool

Mile per gallon (US) (mpg (US)) is a unit of fuel economy (US customary); 1 mpg (US) = 0.4251437074 km/L. Kilometer per liter (km/L) is a unit of fuel economy (metric, accepted for use with the SI).

To convert MPG to km/L, multiply the value by 0.4251437074 (km/L = mpg (US) × 0.4251437074). Example: 5 mpg (US) = 2.125718537 km/L.

Calculated in your browser – nothing you type is sent anywhere.

Frequently asked questions

How do I convert MPG to km/L?

To convert MPG to km/L, multiply the value by 0.4251437074: km/L = mpg (US) × 0.4251437074. For example 5 mpg (US) = 2.125718537 km/L.

What is 1 mpg (US) in km/L?

1 mpg (US) = 0.4251437074 km/L. The other way round, 1 km/L = 2.352145833 mpg (US).

How exact is the result?

The converter uses the official definitions of both units and shows up to 10 significant digits; choose 0–6 decimals to round. Both units are defined exactly in terms of each other, so the factor itself is exact.

Can I convert other units of fuel economy here?

Yes – choose any of the 6 units of fuel economy in the From and To lists, or switch to another measurement at the top.

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