Formula to convert 120 liters to gallons is to multiply 120 by 0.264172 (this is the value for 1 liter to gallon).
Convert 120 Liters to Gallons results
120 x 0.264172052 = 31.700646288
120 l = 31.7 gal
To conclude the answer for 120 liters is thirty one point seven gallons