Formula to convert 12.4 liters to gallons is to multiply 12.4 by 0.264172 (this is the value for 1 liter to gallon).
Convert 12.4 Liters to Gallons results
12.4 x 0.264172052 = 3.27573344976
12.4 l = 3.28 gal
To conclude the answer for 12.4 liters is three point twenty eight gallons