Q&A for How to Calculate Swimming Pool Volume in Gallons

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I have a round pool that measures 27' X 27' X4 1/2'. How much water do I have?

Community Answer

For an approximation, use pi x r-squared, or 13.5 x 13.5 x the value of pi (3.1416); this will be square feet. Multiply by 4.5 for cubic feet. To convert cubic feet to gallons: multiply by 7.48. This is just a quick conversion.

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Question

When is the best time to add chemicals, and how long does the filter need to run?

Community Answer

Some chemicals are okay to swim in. Add acid and shock at night and let the filter run at least 8 hours. Do not go swimming after adding acid or shock for a minimum of 8 hours.

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Question

How do I compute which pump to use in a swimming pool?

Community Answer

1 cubic foot of water contains 6.25 gallons. Measure the pool length and breadth, multiply together, then multiply buy the mean depth to calculate the volume. Then multiply volume x 6.25 for the number of gallons.

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Question

How can I calculate the volume of an oval swimming pool?

Community Answer

0.5 of one axis multiplied by 0.5 of the other axis multiplied by pi multiplied by the depth of the pool.

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Question

How much will the water volume increase when ten people are in the swimming pool?

Community Answer

The water volume would not increase regardless of how many people are in the pool.

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Question

I have a pool that's 4' tall by 13' round, how much water is in the pool?

Community Answer

530 cubic feet of water, or 5,960 gallons.

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