MPG to L/100km Converter
A direct fuel economy converter for US MPG and liters per 100 kilometers. Useful for EV range extenders, rental cars, imports and travel comparisons.
Last updated: April 2026
Why this converter belongs on CovertItAll
This is exactly the kind of practical converter people search for when they are comparing imported cars, old road tests, US specs or fuel economy labels from another region. Europe talks in liters per 100 kilometers. The US talks in miles per gallon. Those numbers do not “feel” comparable until they are converted properly.
The trap is obvious: higher MPG is better, while lower L/100km is better. People routinely misread that. A clean two-way converter solves the problem in seconds and keeps the page useful without bloating it.
Typical use cases
- US car review versus EU brochure
- road trip budgeting
- older forum posts and import listings
- fleet comparison sheets
Quick reference
| US MPG | L/100km |
|---|---|
| 20 | 11.76 |
| 30 | 7.84 |
| 40 | 5.88 |
| 50 | 4.70 |
Frequently asked questions
Does this page use US or UK MPG?
This version uses US MPG. UK MPG is different and always gives a larger number for the same car. Mixing them up gives bad comparisons.
Why is this better than rounding roughly in my head?
Because fuel economy comparisons are easy to misread. One exact conversion prevents bad assumptions when you are comparing test results, ads or travel budgets.
What is a decent modern petrol number?
For many regular petrol cars, something around 5 to 7.5 L/100km is generally respectable. Heavier SUVs and performance cars will usually sit higher.