Gallons of Water Per Pool Size

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Pool owners should become aware of one important aspect of pool maintenance: water volume. This number can fluctuate greatly for the slightest of changes in pool dimensions. The number of gallons in a swimming pool determines the amount of chemicals that go into your pool as well. All pool chemicals are measured in terms of pool gallons.

Number of Gallons

  • The numbers of gallons in your swimming pool can easily be calculated with online tools. One of many water volume calculators can be found at the website Poolcalculator.com. Here you will navigate down to the section titled "Estimating pool volume." Enter your pool's length, width, depth (in feet) and shape. An approximate number will be generated based on your entries.

Calculating Range of Depths

  • If the depth varies in your pool--most notably for in-ground pools--you must find the average depth to get the best approximation of your pool water volume. Take the depth in feet of the shallowest and deepest ends respectively and add the two numbers together. Divide by two to get the average depth. Add this number into the calculator for depth.

Why It's Important

  • Pool chemicals are added according to gallons of water. Chemicals such as chlorine and various pH, alkalinity and algaecide products usually recommend doses per every 5,500 gallons of water. Therefore, if you add too much or too little of the chemicals needed for your pool, it can actually have an adverse reaction. The clarity and overall health of your swimming water will suffer. Knowing your pool water capacity takes the guessing out of pool maintenance.

Filter Size

  • A pool with more than 10,000 gallons of water will require a pool filter with a stronger motor to handle the demands of circulating the large amount of pool water. Pool pump motor sizes come as big as 2 horsepower, while most smaller pool owners can get by with the smaller 1-horsepower motor.

References

  • Photo Credit Jupiterimages/Comstock/Getty Images
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