How many liters equal one gallon?

About 3.79 liters make a US gallon. Even more roughly, it's 3.8

To convert liters to gallons, multiply liters by 0.264172

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To convert US gallons to liters, multiply gallons by 3.79;

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However, if you are asking about the British or Imperial gallon:

To convert British gallons to liters, multiply gallons by 4.54; to convert liters to British gallons, multiply liters by 0.22; hence, 4.54 liters make a British gallon.

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1 gallon [US, liquid] = 3.78541178 liters.

1 gallon [US, liquid] = 4.000 US quarts exactly.

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1 gallon [US, liquid] =
0.133681 ft³ and
128.000 fluid ounces and
0.003785 m³ and
3785.411 cm³ and
3785.411 ml

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1 liter = 0.2642 gallons
1 gallon = 3.785 liters
3.78 liters = 1 US Gallon
4.55 litres = 1 British gallon

Well Simply we can say

36 miles per gallon
36*2.2= 79.2km
1gallon = 3.7 lts
79.2km per gallon
i.e. 21.4km per ltrs