Formula to convert 64.4 liters to gallons is to multiply 64.4 by 0.264172 (this is the value for 1 liter to gallon).
Convert 64.4 Liters to Gallons results
64.4 x 0.264172052 = 17.01268017456
64.4 l = 17.01 gal
To conclude the answer for 64.4 liters is seventeen point zero one gallons