Size Gallons / Liters Perimeter Pool Area 14' x 28' 9,200 / 34,800 73' 307 SqFt 16' x 32' 12,100 / 45,800 84' 406 SqFt 18' x 36' 18,500 / 70,000 94' 516 SqFt 20' x 40' 23,400 / 88,600 107' 658 SqFt