Formula to convert 15.4 liters to gallons is to multiply 15.4 by 0.264172 (this is the value for 1 liter to gallon).
Convert 15.4 Liters to Gallons results
15.4 x 0.264172052 = 4.06824960696
15.4 l = 4.07 gal
To conclude the answer for 15.4 liters is four point zero seven gallons