Fuel Economy converter
Miles per Gallon (US) to Liters per 100km
If you need to know how many Liters per 100km one Miles per Gallon (US) contains, the answer is 235.214584. The conversion is linear, so 10 mpg is 23.521458 L/100km and 100 mpg is 2.352146 L/100km. Use the converter for any other value.
Formula 1 mpg = 235.214584 L/100km
Need the other direction? Liters per 100km to Miles per Gallon (US).
How to convert Miles per Gallon (US) to Liters per 100km
US miles per gallon equals about 0.425 km/L; the UK gallon is larger. Litres per 100 km is an inverse measure: lower is better, and it is not linear.
To convert Miles per Gallon (US) to Liters per 100km, multiply the value in mpg by 235.214584. For example, 10 mpg × 235.214584 = 23.521458 L/100km. This works because the ratio between the two units is constant for every value in fuel economy.
Worked examples
| mpg | L/100km |
|---|---|
| 1 mpg | 235.214584 L/100km |
| 2.5 mpg | 94.085833 L/100km |
| 5 mpg | 47.042917 L/100km |
| 10 mpg | 23.521458 L/100km |
| 25 mpg | 9.408583 L/100km |
| 50 mpg | 4.704292 L/100km |
| 100 mpg | 2.352146 L/100km |
Reverse conversion
| L/100km | mpg |
|---|---|
| 1 L/100km | 235.214584 mpg |
| 5 L/100km | 47.042917 mpg |
| 10 L/100km | 23.521458 mpg |
| 25 L/100km | 9.408583 mpg |
| 50 L/100km | 4.704292 mpg |
| 100 L/100km | 2.352146 mpg |
When this conversion is useful
This is the calculation you need when you are comparing a car's consumption with a different unit system. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 mpg is 0.23521458 L/100km.
Is the conversion exact?
No: fuel economy has inverse units. Litres per 100 km and gallons per mile fall as efficiency rises, so the conversion divides rather than multiplies.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
mpg to L/100km conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Miles per Gallon (US) (mpg) | Liters per 100km (L/100km) |
|---|---|
| 1 mpg | 235.214584 L/100km |
| 2 mpg | 117.607292 L/100km |
| 3 mpg | 78.404861 L/100km |
| 4 mpg | 58.803646 L/100km |
| 5 mpg | 47.042917 L/100km |
| 6 mpg | 39.202431 L/100km |
| 7 mpg | 33.602083 L/100km |
| 8 mpg | 29.401823 L/100km |
| 9 mpg | 26.134954 L/100km |
| 10 mpg | 23.521458 L/100km |
| 11 mpg | 21.383144 L/100km |
| 12 mpg | 19.601215 L/100km |
| 13 mpg | 18.09343 L/100km |
| 14 mpg | 16.801042 L/100km |
| 15 mpg | 15.680972 L/100km |
| 16 mpg | 14.700911 L/100km |
| 17 mpg | 13.836152 L/100km |
| 18 mpg | 13.067477 L/100km |
| 19 mpg | 12.379715 L/100km |
| 20 mpg | 11.760729 L/100km |
| 21 mpg | 11.200694 L/100km |
| 22 mpg | 10.691572 L/100km |
| 23 mpg | 10.226721 L/100km |
| 24 mpg | 9.800608 L/100km |
| 25 mpg | 9.408583 L/100km |
| 26 mpg | 9.046715 L/100km |
| 27 mpg | 8.711651 L/100km |
| 28 mpg | 8.400521 L/100km |
| 29 mpg | 8.110848 L/100km |
| 30 mpg | 7.840486 L/100km |
| 31 mpg | 7.587567 L/100km |
| 32 mpg | 7.350456 L/100km |
| 33 mpg | 7.127715 L/100km |
| 34 mpg | 6.918076 L/100km |
| 35 mpg | 6.720417 L/100km |
| 36 mpg | 6.533738 L/100km |
| 37 mpg | 6.357151 L/100km |
| 38 mpg | 6.189857 L/100km |
| 39 mpg | 6.031143 L/100km |
| 40 mpg | 5.880365 L/100km |
| 41 mpg | 5.736941 L/100km |
| 42 mpg | 5.600347 L/100km |
| 43 mpg | 5.470107 L/100km |
| 44 mpg | 5.345786 L/100km |
| 45 mpg | 5.226991 L/100km |
| 46 mpg | 5.113361 L/100km |
| 47 mpg | 5.004566 L/100km |
| 48 mpg | 4.900304 L/100km |
| 49 mpg | 4.800298 L/100km |
| 50 mpg | 4.704292 L/100km |
| 60 mpg | 3.920243 L/100km |
| 70 mpg | 3.360208 L/100km |
| 80 mpg | 2.940182 L/100km |
| 90 mpg | 2.613495 L/100km |
| 100 mpg | 2.352146 L/100km |
Frequently asked questions
How many Liters per 100km are in 1 Miles per Gallon (US)?
1 mpg equals 235.214584 L/100km.
How do I convert Miles per Gallon (US) to Liters per 100km?
Multiply the mpg value by 235.214584. Example: 25 mpg = 9.408583 L/100km.
What is 2.5 mpg in L/100km?
2.5 mpg = 94.085833 L/100km.
Is the mpg to L/100km conversion exact?
No: fuel economy has inverse units. Litres per 100 km and gallons per mile fall as efficiency rises, so the conversion divides rather than multiplies.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.