Formula to convert 12.8 liters to gallons is to multiply 12.8 by 0.264172 (this is the value for 1 liter to gallon).
Convert 12.8 Liters to Gallons results
12.8 x 0.264172052 = 3.38140227072
12.8 l = 3.38 gal
To conclude the answer for 12.8 liters is three point thirty eight gallons