Miles per Gallon US (mpg US) to Miles per Liter (mi/L)

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Miles per Gallon US (mpg US) to Miles per Liter (mi/L) conversion table

Here are the most common conversions for Miles per Gallon US (mpg US) to Miles per Liter (mi/L) at a glance.

Miles per Gallon US (mpg US)	Miles per Liter (mi/L)
0.1	0.02641721
0.5	0.13208603
1	0.26417205
2	0.52834410
3	0.79251616
5	1.32086026
10	2.64172052
20	5.28344105
30	7.92516157
50	13.20860262
100	26.41720524

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Converting Miles per Gallon US (mpg US) to Miles per Liter (mi/L)

Fuel economy is the odd one out among conversions: it is usually a rate, and converting Miles per Gallon US (mpg US) to Miles per Liter (mi/L) means flipping between "fuel per distance" (liters per 100 km) and "distance per fuel" (miles per gallon) — which are mathematical inverses, not simple multiples. Better economy means a smaller L/100km number but a larger mpg number.

The Two MPG Problem

US gallons (3.785 L) and imperial gallons (4.546 L) differ by 20%, so "30 mpg" means two different things depending on which side of the Atlantic you are on — always check. The conversion everyone should know: 235.21 ÷ mpg (US) = L/100km, which lets you compare any car review worldwide.

Practical Tips

Comparing cars? Convert everything to L/100km — it is linear, so halving it truly halves your fuel bill, while mpg improvements have diminishing returns (going 10→20 mpg saves far more fuel than 30→40). For EVs, the emerging standard is kWh/100km or miles/kWh — same inverse logic.