MPG (US) to Liters per 100 km Converter (mpg to L/100 km)
L/100 km = 235.215 ÷ US mpg. Convert EPA fuel economy ratings to liters per 100 km for comparison with European and Canadian figures.
L/100 km = 100 × 3.785411784 ÷ (1.609344 × mpg (US))
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.
Liter per 100 Kilometers (L/100 km): Liters per 100 kilometers measures fuel used over a distance of 100 km. Lower values mean less fuel for that distance, and 5 L/100 km equals 20 km/L. Reciprocal conversions require finite values greater than zero.
| Mile per Gallon (US) (mpg (US)) | Liter per 100 Kilometers (L/100 km) |
|---|---|
| 1 | 235.214583333 |
| 5 | 47.0429166667 |
| 10 | 23.5214583333 |
| 25 | 9.40858333333 |
| 50 | 4.70429166667 |
| 100 | 2.35214583333 |
US window stickers and the government's fueleconomy.gov rate cars in miles per US gallon, while Canada, Australia and Europe state fuel consumption in liters per 100 kilometers. The two run in opposite directions: more mpg is better, but a lower L/100 km figure is better, so the conversion is a division rather than a multiplication.
The constant comes from exact definitions. A US gallon is 3.785411784 liters and a mile is 1.609344 kilometers, so L/100 km equals about 235.215 divided by mpg. Because of that reciprocal, each extra mpg saves less fuel as the number climbs: the EPA's own example shows that going from 10 to 15 mpg saves about 33 gallons over 1,000 miles, while 30 to 35 mpg saves only about 5.
How to use this tool
- Type a value in the Mile per Gallon (US) box to see it in liters per 100 kilometers, or type in the Liter per 100 Kilometers box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Fuel Economy converter.
Formula
L/100 km = 100 × 3.785411784 ÷ (1.609344 × mpg (US))
mpg (US) = 100 × 3.785411784 ÷ (1.609344 × L/100 km)
The two units are reciprocals of each other: a value in one times the matching value in the other always gives 235.214583333, so a larger number on one side means a smaller number on the other.
Example
Two conversions worked with the same factors the converter uses:
30 mpg (US) ≈ 7.84049 L/100 km
6.5 L/100 km ≈ 36.1869 mpg (US)
Mile per Gallon (US) to Liter per 100 Kilometers chart
Common values from miles per gallon (US) to liters per 100 kilometers, rounded to four decimal places.
| Mile per Gallon (US) (mpg (US)) | Liter per 100 Kilometers (L/100 km) |
|---|---|
| 10 | 23.5215 |
| 12 | 19.6012 |
| 15 | 15.681 |
| 18 | 13.0675 |
| 20 | 11.7607 |
| 22 | 10.6916 |
| 24 | 9.8006 |
| 25 | 9.4086 |
| 26 | 9.0467 |
| 28 | 8.4005 |
| 30 | 7.8405 |
| 32 | 7.3505 |
| 33 | 7.1277 |
| 35 | 6.7204 |
| 38 | 6.1899 |
| 40 | 5.8804 |
| 42 | 5.6003 |
| 45 | 5.227 |
| 50 | 4.7043 |
| 55 | 4.2766 |
| 60 | 3.9202 |
| 70 | 3.3602 |
| 100 | 2.3521 |
Liter per 100 Kilometers to Mile per Gallon (US) chart
The reverse direction for values people often look up.
| Liter per 100 Kilometers (L/100 km) | Mile per Gallon (US) (mpg (US)) |
|---|---|
| 3 | 78.4049 |
| 3.5 | 67.2042 |
| 4 | 58.8036 |
| 4.5 | 52.2699 |
| 5 | 47.0429 |
| 5.5 | 42.7663 |
| 6 | 39.2024 |
| 6.5 | 36.1869 |
| 7 | 33.6021 |
| 8 | 29.4018 |
| 9 | 26.135 |
| 10 | 23.5215 |
| 12 | 19.6012 |
| 15 | 15.681 |
| 20 | 11.7607 |
The EPA's "MPG illusion" and other ratings
| Vehicle | Mile per Gallon (US) (mpg (US)) | Liter per 100 Kilometers (L/100 km) |
|---|---|---|
| Inefficient vehicle in the EPA "MPG illusion" example | 10 | 23.5215 |
| The same vehicle improved by 5 mpg | 15 | 15.681 |
| Large pickup or SUV, a typical rating | 20 | 11.7607 |
| Efficient car in the same EPA example | 30 | 7.8405 |
| The efficient car improved by 5 mpg | 35 | 6.7204 |
| Hybrid sedan, a typical rating | 50 | 4.7043 |
Quick mental estimate
Divide 235 by the mpg: 30 mpg (US) → 235 ÷ 30 ≈ 7.8 L/100 km. Using 235 in place of 235.215 changes the answer by less than 0.1%.
Use the converter or the charts when the exact figure matters.
The two units
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.
Liter per 100 Kilometers (L/100 km): Liters per 100 kilometers measures fuel used over a distance of 100 km. Lower values mean less fuel for that distance, and 5 L/100 km equals 20 km/L. Reciprocal conversions require finite values greater than zero.
Frequently asked questions
What is 30 mpg in L/100 km?
About 7.84 L/100 km. A car rated 40 mpg uses about 5.88 L/100 km, and one rated 20 mpg about 11.76.
Why is going from 15 to 20 mpg a bigger saving than 40 to 45 mpg?
Fuel used is the reciprocal of mpg. Moving from 15 to 20 mpg cuts consumption from about 15.7 to 11.8 L/100 km, a drop of about 3.9, while 40 to 45 mpg only cuts it from about 5.9 to 5.2 L/100 km.
Does this work for UK mpg?
No. UK figures use the imperial gallon of 4.54609 liters, so the constant becomes about 282.48 instead of 235.215. The same car shows an mpg figure about 20% higher in the UK than in the US.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/mpg-us-to-liters-per-100-km-converter/
Cite or embed this tool
kakaoCalc. (2026, November 8). MPG (US) to Liters per 100 km Converter (mpg to L/100 km). https://kakao.mobile/tools/mpg-us-to-liters-per-100-km-converter/
“MPG (US) to Liters per 100 km Converter (mpg to L/100 km).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/mpg-us-to-liters-per-100-km-converter/.
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