Formula to convert 40.5 liters to gallons is to multiply 40.5 by 0.264172 (this is the value for 1 liter to gallon).
Convert 40.5 Liters to Gallons results
40.5 x 0.264172052 = 10.6989681222
40.5 l = 10.7 gal
To conclude the answer for 40.5 liters is ten point seven gallons