In bespeak to number out the appropriate doses of chemicals for her pool, you need to identify how plenty of gallons that water it holds. To do that, you must use a ruler to measure up your pool to find out these four various numbers; Length, Width, median depth and also a multiplier the determines gallons.
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So here are the recipe to number out how much water is in her swimming pool:These formulas hold true for both Inground pools as well as over ground pools.
Rectangular, Square or Free form Pools:
Length x broad x mean 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 median Depth x 5.9 = full gallons
For example: 18′ x 18′ x 4′ x 5.9 = 7,646 Gallons
Oval Pools:
Length x broad x median Depth x 5.9 = full gallons
For example: 15′ x 30′ x 4′ x 5.9 = 10,620 Gallons
How to recognize the mean Depth that a swimming Pool where the bottom slopes:
Below is a side-shot that the “typical” inground pool that has a shallow end (see “D”), then a slope that leads into the deep finish (see “C”).

First measure up the depth that “D”, the shallow end (usually everywhere from 3′ come 5′), and then measure the depth the “C”, the deep end (usually anywhere between 6′ and 12′) . Then, include them together and also divide through 2. This is the average depth of your pool.
For example, if your shallow finish “D” is 3′, and your deep end “C” is 8′, this would be her formula for the average Depth:
3′ + 8′ = 11′
11′ divided by 2 = 5.5.
Therefore, in this example, your mean depth would certainly be 5 1/2 feet.
Most usual Sizes that Inground rectangular Pools
Below, we have developed some handy charts the the most well-known sizes the poolsand how numerous gallons of water room in them.
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POOL SIZE | 4′ AVG. DEPTH | 4.5′ AVG. DEPTH | 5′ AVG. DEPTH | 5.5′ AVG. DEPTH | 6′ AVG. DEPTH |
12′ X 24′ | 8,640 | 9,720 | 10,800 | 11,880 | 12,960 |
14′ X 28′ | 11,760 | 13,230 | 14,700 | 16,170 | 17,640 |
15′ X 30′ | 13,500 | 15,200 | 19,900 | 18,600 | 20,250 |
16′ X 32′ | 15,400 | 17,300 | 19,200 | 21,100 | 23,040 |
18′ X 36′ | 19,400 | 21,900 | 24,300 | 26,700 | 29,160 |
20′ X 40′ | 24,000 | 27,000 | 30,000 | 33,000 | 36,000 |
25′ X 45′ | 33,750 | 37,968 | 42,187 | 46,406 | 50,625 |
25′ X 50′ | 37,500 | 42,200 | 46,900 | 51,600 | 56,250 |
30′ X 50′ | 45,000 | 50,525 | 56,250 | 61,875 | 67,500 |
Most typical Sizes Of above Ground Pools

Above floor Pools with a Depth that 48″ (4′)
SIZE | GALLONS of WATER |
12′ Round | 3,398 |
15′ Round | 5,310 |
18′ Round | 7,646 |
21′ Round | 10,407 |
24′ Round | 13,593 |
27′ Round | 17,204 |
28′ Round | 18,502 |
30′ Round | 21,240 |
33′ Round | 25,700 |
15′ x 30′ Oval | 10,620 |
SIZE | GALLONS that WATER |
12′ Round | 3,823 |
15′ Round | 5,973 |
18′ Round | 8,602 |
21′ Round | 11,708 |
24′ Round | 15,292 |
27′ Round | 19,354 |
28′ Round | 20,815 |
30′ Round | 23,895 |
33′ Round | 28,912 |
15′ x 30′ Oval | 11,947 |
More comprehensive Information for You:
If you are not utilizing a cell phone, and are using a desktop computer, laptop or tablet, us do have actually a very detailed page with more information add to an digital Pool Water Calculator on our standard Pool and Spa desktop site.Click below to view our E-Z swimming pool Water Calculator page.Previous post: how To Replace and also Install one Inground swimming pool Ladder