L/100 km to MPG

Liters per 100 kilometers and miles per US gallon

Liters per 100 km is the fuel needed to drive 100 kilometers; lower numbers mean better economy. Europe, Canada, Australia and China rate fuel consumption in L/100 km.

US miles per gallon is the distance in miles driven on one US gallon (3.785 L). EPA window stickers and car reviews in the US quote mpg.

Worked example

Convert 6.5 L/100 km with mpg = 235.214583 ÷ L/100 km: the result is 36.18685897 mpg. Likewise 7 L/100 km = 33.60208333 mpg.

Estimating in your head

Divide 235 by the L/100 km figure: 6.5 L/100 km is about 36 mpg.

Going the other way

To convert miles per US gallon to liters per 100 kilometers, type in the right-hand box; the page solves the same formula backwards. The swap button between the boxes opens the reverse page.

mpg = 235.214583 ÷ L/100 km

One of these measures distance per fuel and the other fuel per distance, so they are reciprocals and the conversion is a division. The constant 235.214583 comes from 100 km and the exact mile (1.609344 km) and US gallon (3.785411784 L). Results drop binary floating-point noise beyond 15 significant digits and display at the precision you choose (6 significant figures by default). Copy result copies the full value.