In stimulate to figure out the proper doses of chemistry for her pool, you require to identify how plenty of gallons the water the holds. To do that, you need to use a leader to measure up your swimming pool to discover out this four different numbers; Length, Width, average depth and also a multiplier that determines gallons.

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So right here are the recipe to number out exactly how much water is in her swimming pool:These formulas hold true for both Inground pools as well as above ground pools.

Rectangular, Square or Free kind Pools:

Length x broad x median Depth x 7.5 = full gallons

For example: 16′ x 32′ x 4.5′ x 7.5 = 17,280 Gallons

Circular Pools:

Diameter x Diameter x mean Depth x 5.9 = complete gallons

For example: 18′ x 18′ x 4′ x 5.9 = 7,646 Gallons

Oval Pools:

Length x width x median Depth x 5.9 = total gallons

For example: 15′ x 30′ x 4′ x 5.9 = 10,620 Gallons

How to determine the median Depth the a swimming Pool where the bottom slopes:

Below is a side-shot of the “typical” inground pool that has actually a shallow end (see “D”), climate a slope the leads right into the deep finish (see “C”).


First measure up the depth that “D”, the shallow end (usually anywhere from 3′ to 5′), and also then measure up the depth the “C”, the deep finish (usually anywhere between 6′ and 12′) . Then, add them together and also divide through 2. This is the typical depth of her pool.

For example, if her shallow end “D” is 3′, and your deep end “C” is 8′, this would certainly be your formula because that the median Depth:

3′ + 8′ = 11′

11′ split by 2 = 5.5.

Therefore, in this example, your median depth would certainly be 5 1/2 feet.

Most common Sizes the Inground rectangular Pools

Below, us have created some comfortable charts that the most well-known sizes that poolsand how many gallons the water are in them.

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12′ X 24′8,6409,72010,80011,88012,960
14′ X 28′11,76013,23014,70016,17017,640
15′ X 30′13,50015,20019,90018,60020,250
16′ X 32′15,40017,30019,20021,10023,040
18′ X 36′19,40021,90024,30026,70029,160
20′ X 40′24,00027,00030,00033,00036,000
25′ X 45′33,75037,96842,18746,40650,625
25′ X 50′37,50042,20046,90051,60056,250
30′ X 50′45,00050,52556,25061,87567,500

Most typical Sizes Of over Ground Pools


Above floor Pools with a Depth the 48″ (4′)



12′ Round3,398
15′ Round5,310
18′ Round7,646
21′ Round10,407
24′ Round13,593
27′ Round17,204
28′ Round18,502
30′ Round21,240
33′ Round25,700
15′ x 30′ Oval10,620



12′ Round3,823
15′ Round5,973
18′ Round8,602
21′ Round11,708
24′ Round15,292
27′ Round19,354
28′ Round20,815
30′ Round23,895
33′ Round28,912
15′ x 30′ Oval11,947

More thorough Information for You:

If you room not utilizing a cabinet phone, and also are utilizing a desktop computer computer, laptop or tablet, we do have actually a an extremely detailed web page with an ext information to add an digital Pool Water Calculator ~ above our standard Pool and Spa desktop computer site.Click right here to view our E-Z pool Water Calculator page.

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