Formula to convert 17.8 liters to gallons is to multiply 17.8 by 0.264172 (this is the value for 1 liter to gallon).
Convert 17.8 Liters to Gallons results
17.8 x 0.264172052 = 4.70226253272
17.8 l = 4.7 gal
To conclude the answer for 17.8 liters is four point seven gallons