Formula to convert 6.4 liters to gallons is to multiply 6.4 by 0.264172 (this is the value for 1 liter to gallon).
Convert 6.4 Liters to Gallons results
6.4 x 0.264172052 = 1.69070113536
6.4 l = 1.69 gal
To conclude the answer for 6.4 liters is one point sixty nine gallons