Formula to convert 3.8 liters to gallons is to multiply 3.8 by 0.264172 (this is the value for 1 liter to gallon).
Convert 3.8 Liters to Gallons results
3.8 x 0.264172052 = 1.00385379912
3.8 l = 1 gal
To conclude the answer for 3.8 liters is one gallons