Formula to convert 6.5 liters to gallons is to multiply 6.5 by 0.264172 (this is the value for 1 liter to gallon).
Convert 6.5 Liters to Gallons results
6.5 x 0.264172052 = 1.7171183406
6.5 l = 1.72 gal
To conclude the answer for 6.5 liters is one point seventy two gallons