Formula to convert 31.5 liters to gallons is to multiply 31.5 by 0.264172 (this is the value for 1 liter to gallon).
Convert 31.5 Liters to Gallons results
31.5 x 0.264172052 = 8.3214196506
31.5 l = 8.32 gal
To conclude the answer for 31.5 liters is eight point thirty two gallons