Formula to convert 42.1 liters to gallons is to multiply 42.1 by 0.264172 (this is the value for 1 liter to gallon).
Convert 42.1 Liters to Gallons results
42.1 x 0.264172052 = 11.12164340604
42.1 l = 11.12 gal
To conclude the answer for 42.1 liters is eleven point twelve gallons