Formula to convert 10.4 liters to gallons is to multiply 10.4 by 0.264172 (this is the value for 1 liter to gallon).
Convert 10.4 Liters to Gallons results
10.4 x 0.264172052 = 2.74738934496
10.4 l = 2.75 gal
To conclude the answer for 10.4 liters is two point seventy five gallons