Formula to convert 18.9 liters to gallons is to multiply 18.9 by 0.264172 (this is the value for 1 liter to gallon).
Convert 18.9 Liters to Gallons results
18.9 x 0.264172052 = 4.99285179036
18.9 l = 4.99 gal
To conclude the answer for 18.9 liters is four point ninety nine gallons