Formula to convert 28 liters to gallons is to multiply 28 by 0.264172 (this is the value for 1 liter to gallon).
Convert 28 Liters to Gallons results
28 x 0.264172052 = 7.3968174672
28 l = 7.4 gal
To conclude the answer for 28 liters is seven point four gallons