miles per gallon to km per liter — mpg to km/L Converter

Free online miles per gallon to km per liter converter (mpg to km/L). Instant conversion, formula, table, real-world examples and FAQs.

Enter value in miles per gallon

mpg to km/L

Conversion Formula

Multiply the miles per gallon value by the conversion factor:
km/L = mpg × 0.4251

How to Convert Step by Step

Enter the number of miles per gallon you want to convert (e.g. 10 mpg).
Multiply it by the factor 0.4251.
Round the result to 2–4 decimals for practical use — done, that is your value in km per liter.

Common miles per gallon to km/L Conversion Table

miles per gallon (mpg)	km per liter (km/L)
1 mpg	0.4251 km/L
2 mpg	0.8503 km/L
5 mpg	2.1257 km/L
10 mpg	4.2514 km/L
20 mpg	8.5029 km/L
50 mpg	21.2572 km/L
100 mpg	42.5144 km/L
200 mpg	85.0288 km/L
500 mpg	212.572 km/L
1000 mpg	425.144 km/L

Real-World Examples

mpg is used in US car ads and owner forums. Example: 10 mpg ≈ 4.2514 km/L.
km/L is used to compare car efficiency and running costs. Example: 20 km/L ≈ 47.0429 mpg.
mpg is used in US car ads and owner forums. Another common case: 50 mpg = 21.2572 km/L.

About miles per gallon & km per liter

• miles per gallon: mpg (miles per US gallon) is US fuel economy: 1 mpg ≈ 0.425 km/L. US SUVs often get 20–30 mpg.
• km per liter: km/L measures fuel economy in HK; modern small cars manage 15–25 km/L. Higher is more efficient.
• Fuel economy uses US gallons (3.7854 L); imperial gallons (4.5461 L) differ — check the region.

FAQ

How many km per liter in 1 mpg?

1 mpg = 0.4251 km/L. Use the converter above to compute any value, or multiply mpg by 0.4251.

Is this miles per gallon-to-km per liter converter accurate?

Yes — conversions use the standard international factors and are rounded to 4 decimals.

When is miles per gallon to km per liter conversion used?

mpg is used in US car ads and owner forums. km/L is used to compare car efficiency and running costs. Whenever a value is given in mpg but you need km/L, this converter is the quick fix.

Related Conversions

km per liter→miles per gallon