Formula to convert 3.1 liters to gallons is to multiply 3.1 by 0.264172 (this is the value for 1 liter to gallon).
Convert 3.1 Liters to Gallons results
3.1 x 0.264172052 = 0.81893336244
3.1 l = 0.82 gal
To conclude the answer for 3.1 liters is zero point eighty two gallons