Formula to convert 64.5 liters to gallons is to multiply 64.5 by 0.264172 (this is the value for 1 liter to gallon).
Convert 64.5 Liters to Gallons results
64.5 x 0.264172052 = 17.0390973798
64.5 l = 17.04 gal
To conclude the answer for 64.5 liters is seventeen point zero four gallons