Kilometers per Liter to MPG (US) Converter (km/L to mpg)

Japan, South Korea and India rate fuel economy in kilometers per liter, and the same unit shows up in parts of Latin America. Like mpg, km/L measures distance per unit of fuel, so higher is better and the conversion to US miles per gallon is a single multiplication rather than the reciprocal needed for L/100 km.

One km/L equals 2.352 US mpg, a factor fixed by the definitions of the mile (1.609344 km) and the US gallon (3.785411784 L). Japanese catalog figures now follow the WLTC test cycle and Indian mileage figures come from type-approval testing by agencies such as ARAI, so a converted number is still a test result, not a promise of what a given driver will see.

How to use this tool

1. Type a value in the Kilometer per Liter box to see it in miles per gallon (US), or type in the Mile per Gallon (US) box to convert the other way.
2. Press ⇄ to swap the two units, or Load example for a typical value.
3. Check the charts below for common values; for other units, open the Fuel Economy converter.

Formula

Mile per Gallon (US) (mpg (US)) = Kilometer per Liter (km/L) × 2.35214583333

Kilometer per Liter (km/L) = Mile per Gallon (US) (mpg (US)) × 0.42514370743

Both factors come from exact definitions: 1 mile per gallon (us) = 0.42514370743 kilometers per liter and 1 kilometer per liter = 2.35214583333 miles per gallon (US) (shown to 12 significant digits).

Example

Two conversions worked with the same factors the converter uses:

15 km/L × 2.35214583333 ≈ 35.2822 mpg (US)

40 mpg (US) × 0.42514370743 ≈ 17.0057 km/L

Kilometer per Liter to Mile per Gallon (US) chart

Common values from kilometers per liter to miles per gallon (US), rounded to four decimal places.

Mile per Gallon (US) to Kilometer per Liter chart

The reverse direction for values people often look up.

km/L figures that match round L/100 km values

Quick mental estimate

Double the km/L, then add a sixth of that: 15 km/L → 30 + 5 = 35 mpg (US). The shortcut multiplies by 2.33, about 0.8% under the exact 2.352, so the true figure is 35.3 mpg.

Use the converter or the charts when the exact figure matters.

The two units

Kilometer per Liter (km/L): Kilometers per liter measures distance traveled per volume of fuel. Higher values represent less fuel used for the same distance; positive values convert to L/100 km by taking 100 divided by km/L.

Mile per Gallon (US) (mpg (US)): Miles per gallon (US) is the fuel-economy figure on US window stickers: how many miles a vehicle travels on one US gallon (3.785411784 L). Higher is better; 1 mpg (US) is about 0.4251 km/L.