Formula to convert 12.1 liters to gallons is to multiply 12.1 by 0.264172 (this is the value for 1 liter to gallon).
Convert 12.1 Liters to Gallons results
12.1 x 0.264172052 = 3.19648183404
12.1 l = 3.2 gal
To conclude the answer for 12.1 liters is three point two gallons