Formula to convert 13.1 liters to gallons is to multiply 13.1 by 0.264172 (this is the value for 1 liter to gallon).
Convert 13.1 Liters to Gallons results
13.1 x 0.264172052 = 3.46065388644
13.1 l = 3.46 gal
To conclude the answer for 13.1 liters is three point forty six gallons