Formula to convert 1.9 liters to gallons is to multiply 1.9 by 0.264172 (this is the value for 1 liter to gallon).
Convert 1.9 Liters to Gallons results
1.9 x 0.264172052 = 0.50192689956
1.9 l = 0.5 gal
To conclude the answer for 1.9 liters is zero point five gallons