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The Water Capacity Of Your Pool

How to determine your pool's capacity?

Before you begin your water treatment program, you must know the capacity of your pool. The amount of chemicals you need will depend on the amount of water your swimming pool holds. Please use the convenient Above Ground pool or In Ground pool gallonage chart below to determine the capacity of your pool.

Above Ground Swimming Pool Gallonage Chart

Pool Depth
Pool Size 48 in. 52 in.
12' Round 3,500 4,000
15' Round 5,500 6,000
18' Round 7,600 8,300
21' Round 10,000 11,000
24' Round 14,000 15,000
27' Round 17,000 19,000
28' Round 18,500 20,000
30' Round 21,000 23,000
12x24 Oval 8,000 8,500
15x24 Oval 9,300 10,000
15x30 Oval 12,000 13,000
16x32 Oval 14,000 15,000
18x33 Oval 16,000 17,000
21x41 Oval 23,000 25,000

In Ground Swimming Pool Gallonage Chart (rectangle pools)

Average Pool Depth
Pool Size <5 ft. 6 ft. 7 ft. <8 ft.
10x20 7,500 9,000 10,500 12,000
12x20 9,000 10,800 12,600 14,400
12x24 10,800 13,000 15,000 17,300
14x28 14,700 17,600 20,500 23,500
15x30 16,900 20,300 23,600 27,000
16x24 14,400 17,300 20,100 23,000
16x32 19,200 23,000 26,800 30,600
16x36 21,600 25,900 30,200 34,500
18x36 24,300 29,200 34,000 38,800
18x40 27,000 32,400 37,700 43,100
20x40 30,000 36,000 41,900 47,900
25x45 42,000 50,500 58,900 67,300

Average Depth (for In Ground pools)

You are required to know the Average Depth of your In Ground pool to use the convenient pool gallonage charts above. Please use this simple equation to determine the average depth of your pool:

Deep End (feet) + Shallow End (feet) รท 2 = Average Depth

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