Common Pool Sizes and Its Capacity In Gallons

Knowing the volume of water (in gallons) in your swimming pool is important in all areas of swimming pool maintenance and chemical applications. It is also vital to know when choosing the appropriate pool equipment for your swimming pool.

The volume of your pool is a calculation of your swimming pool's dimensions multiplied by your pool's average depth. The following chart is designed to help you estimate the gallonage in your style swimming pool. We have also posted many of the most common dimensions with their calculated gallonage.

Average Depth = depth at the deep end + the depth at the shallow end / 2.

Rectangular Pools - Multiply length x width x average depth x 7.5 = gallons

Round Pools- Multiply diameter x diameter x average depth x 5.9 = gallons

Oval Pools - Multiply full width x full length x average depth x 6.7 = gallons

* Irregular shapes and size pools capacity should be determined by your pool builder or specialist.

* If your pool has sloping sides, multiply your final figure of gallonage by 0.85 for correct gallonage.



Above Ground Pools (48" deep)
Pool Size US Gallons
12 ft. Rnd 3,200
15 ft. Rnd 5310
18 ft. Rnd 7646
21 ft. Rnd 10,407
24 ft. Rnd 13,593
27 ft. Rnd 17,204
28 ft. Rnd 18,502
30 ft. Rnd 21,240
12 ft x24 ft Oval 6,400
15 ft x24 ft Oval 8,000
15 ft x 30 ft Oval 10,000
18 ft x 33 ft Oval 13,000


Inground Pools (Average Depth 5 Feet)
Pool Size US Gallons
12 ft x 24 ft 10,800
14 ft x 28 ft 14,700
15 ft x 30 ft 16,875
16 ft x 32 ft 19,200
16 ft x 34 ft 20,400
16 ft x 36 ft 21,600
18 ft x 36 ft 24,300
20 ft x 40 ft 30,000
20 ft x 44 ft 33,000
24 ft x 44 ft 39,600

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