Formula to convert 56.4 liters to gallons is to multiply 56.4 by 0.264172 (this is the value for 1 liter to gallon).
Convert 56.4 Liters to Gallons results
56.4 x 0.264172052 = 14.89930375536
56.4 l = 14.9 gal
To conclude the answer for 56.4 liters is fourteen point nine gallons