Formula to convert 54.9 liters to gallons is to multiply 54.9 by 0.264172 (this is the value for 1 liter to gallon).
Convert 54.9 Liters to Gallons results
54.9 x 0.264172052 = 14.50304567676
54.9 l = 14.5 gal
To conclude the answer for 54.9 liters is fourteen point five gallons