Determining Volume of Water in your Pool

An average pool size is 15 x 30 feet in diameter, 3 - 4 feet deep in the shallow end, and 9 - 15 feet deep in the deep end. The average volume of water in a pool this size is around 10,000 - 15,000 gallons. If you are not fond of doing the math than here is a pretty handy pool volume calculator

The following formula will determine the size of your pool and volume of water. This is crucial information when you go to your pool store as it gives the store employees insight on how much chlorine and pool acid you may have to add every week. Whether your pool is rectangle shaped, kidney shaped, or another design, simply put, the larger the pool, the more chemicals you will have to use.

Once you determine the size of your pool and volume of water, write it in the chart on the next page.

Calculating water volume for a rectangle or square shaped pool

This process is simple and is a combination of length x width x depth x 7.5 to equal the total pool water volume. We’ll do it in the spaces below.

1) With a tape measure, or, using approximate footage, measure the length and width of your pool.

Total length ________ Total width ________

2) Approximate the depth of the shallow end and deep end of your pool.

Depth (shallow end) ________ (deep end) ________

Add together ________ and divide by 2, = ________ total depth

Now, write it all down here:

3) Total length ________ x total width ________ x total depth = ________

Add together:

4) Total ________ x 7.5 = ________ U.S. Gallons.

Write total gallons on chart on next page.

Example:

Depth (shallow end) 4' (deep end) 10'

Add together 14' and divide by 2 = 7' total depth

Total depth: 7' x total length: 30' x total width: 15' x 7.5 = 23,625 Gallons