Formula to convert 16.6 liters to gallons is to multiply 16.6 by 0.264172 (this is the value for 1 liter to gallon).
Convert 16.6 Liters to Gallons results
16.6 x 0.264172052 = 4.38525606984
16.6 l = 4.39 gal
To conclude the answer for 16.6 liters is four point thirty nine gallons