Knowing just what your pool depth is is essential to ensuring proper water chemistry, filtration, pumping, and more. Below we’ve put together a comprehensive pool volume calculator guide that will help you measure the volume of your pool in gallons.
How To Measure Your Pool
For a square shaped pool, measure one side. For a rectangular shaped pool, simply measure the longest and shortest side of the pool. For a circle, measure the diameter of the pool (i.e. right down the center).
Next is measuring the depth. Should your pool be all one depth, then you’ll only need to take one measurement. Should it have a depth that gradually increases, begin by measuring the most shallow end, and then the deep end.
Calculating the Volume
Now you’re ready to begin using the pool volume calculator equations so that you can get the right pool chemistry. We’ll start with rectangular pools:
- Rectangular: Begin by finding the average depth (i.e. the shallow end is 2 feet, the deepest end is 8 feet). Add them together, divide by two, and you’ll find the average depth: (2+8)/2 = 5. Then multiple the results by the width of the pool. Let’s say the pool is 10 feet and the length is 40 feet: 5ft x 10ft x 40 ft = 2000 ft. To convert this number into gallons, simply multiply by 7.8: 2000 x 7.48 = 14 960 gallons
- Round: If you have a round pool that is all one depth, then you can calculate it as V = πr2h. So if the pool’s radius is 4.5 feet and the depth is 4 feet, your equation would look like: π x 4.52 x 4. Take the 254.46 cubic feet, multiply it by the 7.48, and you’ll find that the pool is 1903 gallons.
TIP: If your round pool is of different depths, measure the minimum height, the maximum height, add them together and then divide it by two.
- Free Form: For free form pools, follow the same procedure as in the tip above to find the average depth. To find the average width, simply add up the different widths, and then divide that number by the amount of widths. Find the length of the pool, and then multiple the average depth, average width, and length of the pool together. Multiply by 7.48 and you’ll be able to find its volume in gallons
Shasta Pools is a Phoenix pool builder who provides a variety of services including swimming pool remodeling, commercial pool building, and pool service and repair. Since its establishment in 1967, Shasta has helped over 80,000 families realize their dream of pool ownership. By providing exceptional value, quality craftsmanship and superior customer service, the Shasta team continues to fulfill the corporate mission of astonishing and delighting their customers and exceeding expectations. You can learn more about Shasta Pools & Spas by visiting them online, or by connecting with them on Facebook or Twitter.
Dhruv Gangwal
Dhruv Gangwal is the Marketing Director at Shasta Pools, Arizona’s leading pool builder. With extensive experience in strategic marketing, consumer behavior, and the evolving trends of outdoor living, Dhruv is dedicated to helping homeowners make informed, confident decisions about their pool investments. He works closely with Shasta’s design and sales teams to craft educational resources that simplify the pool-buying process and highlight the latest innovations in backyard living. Known for his customer-first approach and data-driven insights, Dhruv’s articles provide practical advice that homeowners can trust. When he’s not developing marketing strategies, he’s staying ahead of industry trends, exploring new ways to enhance the homeowner experience, and studying how outdoor living spaces continue to shape modern lifestyles.
