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Convert miles per US gallon to kilometers per liter

Convert miles per US gallon (mpg) to kilometers per liter (km/L). 1 mpg = 0.425144 km/L, and 1 km/L = 2.35215 mpg.

20 mpg = 8.50287 km/L

MPG to KM/L formula

km/L = mpg × 0.4251437074

Multiply the number of miles per US gallon by 0.4251437074.

Example: To convert 20 mpg to kilometers per liter: 20 × 0.4251437074 = 8.50287 km/L.

Quick answers

What is 20 mpg in kilometers per liter?
20 mpg = 8.50287 km/L
What is 25 mpg in kilometers per liter?
25 mpg = 10.6286 km/L
What is 30 mpg in kilometers per liter?
30 mpg = 12.7543 km/L
What is 40 mpg in kilometers per liter?
40 mpg = 17.0057 km/L

MPG to KM/L conversion table

KM/L to MPG table
miles per US gallon (mpg)kilometers per liter (km/L)
10 mpg4.25144 km/L
15 mpg6.37716 km/L
18 mpg7.65259 km/L
20 mpg8.50287 km/L
22 mpg9.35316 km/L
25 mpg10.6286 km/L
28 mpg11.904 km/L
30 mpg12.7543 km/L
32 mpg13.6046 km/L
35 mpg14.88 km/L
40 mpg17.0057 km/L
45 mpg19.1315 km/L
50 mpg21.2572 km/L
60 mpg25.5086 km/L

Frequently asked questions

How do I convert miles per US gallon to kilometers per liter?

Multiply the number of miles per US gallon by 0.4251437074. To convert 20 mpg to kilometers per liter: 20 × 0.4251437074 = 8.50287 km/L.

Is the MPG to KM/L conversion exact?

Yes. Both units are defined exactly, so 1 mile per US gallon is exactly 0.42514370743 kilometers per liter. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.

Why are US and UK mpg different?

A US gallon is 3.785 L and an imperial gallon is 4.546 L. Because the UK gallon is about 20% larger, the same car gets about 20% more miles per gallon in UK figures.

What is 20 mpg in kilometers per liter?

20 mpg = 8.50287 km/L.

How do I convert kilometers per liter back to miles per US gallon?

Use the reverse relationship: 1 km/L = 2.35215 mpg. The KM/L to MPG page has a converter and a full table.

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