Size Gallons / Liters Perimeter Pool Area 14' x 28' 11,000 / 41,600 79' 374 SqFt 16' x 32' 17,700 / 67,000 92' 495 SqFt 16' x 36' 19,100 / 72,300 100' 562 SqFt 18' x 36' 21,400 / 81,000 104' 627 SqFt 20' x 40' 27,700 / 104,900 114' 773 SqFt