Size Gallons / Liters Perimeter Pool Area 12' x 24' 7,200 / 27,300 63' 240 SqFt 14' x 28' 9,600 / 36,300 74' 329 SqFt 16' x 32' 15,800 / 59,800 83' 428 SqFt 16' x 34' 16,600 / 62,800 88' 461 SqFt 18' x 36' 18,700 / 70,800 95' 524 SqFt 20' x 40' 23,100 / 87,400 106' 655 SqFt