⛽ Fuel Efficiency
mpg (US) to km/L Converter
Convert mpg (US) to km/L instantly with a reference conversion table.
Quick answer: To convert mpg (US) to km/L, multiply by 0.425144. For example, 1 mpg (US) = 0.425144 km/L. Use the calculator below for any value.
mpg (US) to km/L
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Common conversions
| mpg (US) | km/L |
|---|
Formula:
How to convert mpg (US) to km/L
1
Enter your value
Type the number of mpg (us) you want to convert into the left box. The result in km/l appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — km/L to mpg (US). Your current value carries across so you don't have to re-enter anything.
3
About mpg (US) and km/L
mpg (US) and km/L are common fuel measurements.
💡 Did you know?
1 US MPG = 0.4251 km/L. A 25 US MPG car achieves 10.63 km/L. Japanese fuel efficiency ratings use km/L; Japanese cars exported to the US are often re-rated in US MPG. A comparison: a 'good' 30 US MPG = 12.75 km/L = 18.85 L/100km (wait, that's wrong direction).
📊 Common conversions at a glance
| mpg (US) | km/L |
|---|---|
| 5 | 2.126 |
| 10 | 4.251 |
| 15 | 6.377 |
| 20 | 8.503 |
| 25 | 10.63 |
| 30 | 12.75 |
Reviewed for 2026. mpg (US) ↔ km/L conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.