Formula to convert 81.5 liters to gallons is to multiply 81.5 by 0.264172 (this is the value for 1 liter to gallon).
Convert 81.5 Liters to Gallons results
81.5 x 0.264172052 = 21.5300222706
81.5 l = 21.53 gal
To conclude the answer for 81.5 liters is twenty one point fifty three gallons