Formula to convert 1.8 liters to gallons is to multiply 1.8 by 0.264172 (this is the value for 1 liter to gallon).
Convert 1.8 Liters to Gallons results
1.8 x 0.264172052 = 0.47550969432
1.8 l = 0.48 gal
To conclude the answer for 1.8 liters is zero point forty eight gallons