Formula to convert 21.7 liters to gallons is to multiply 21.7 by 0.264172 (this is the value for 1 liter to gallon).
Convert 21.7 Liters to Gallons results
21.7 x 0.264172052 = 5.73253353708
21.7 l = 5.73 gal
To conclude the answer for 21.7 liters is five point seventy three gallons