Formula to convert 18.6 liters to gallons is to multiply 18.6 by 0.264172 (this is the value for 1 liter to gallon).
Convert 18.6 Liters to Gallons results
18.6 x 0.264172052 = 4.91360017464
18.6 l = 4.91 gal
To conclude the answer for 18.6 liters is four point ninety one gallons