Knowing your pool’s volume in gallons is important to many facets of pool maintenance. For example, knowing your pool’s volume in gallons helps you calculate correct dosages for chemical treatments, filtration cycles, and sizing of pool equipment. In this article, we show you how to calculate your pool’s gallonage, as well as an easy reference chart for your pool.
The formulas used for calculating your pool’s volume in gallons are based on this Length (ft) x Width (ft) x Constant x Depth (ft). Round and oval pools use a constant of 5.9 and rectangular calculations use 7.5; see below examples.
12′ Round w/48″ Wall A/G Pool: 12 x 12 x 5.9 x 3.5 = 2,794 gallons
12′ x 24′ Oval w/52″ Wall A/ G Pool: 12 x 17 x 5.9 x 3.83 = 5,608 gallons
20′ x 40′ Rectangle, 5′ Average Depth Inground Pool: 20 x 40 x 7.5 x 5 = 30,000 gallons
For above ground pools, we assume the actual fill depth is 6-inches below wall height. We account for that by substituting 3.5 for 48″ wall, 3.83 for 52″ wall, and 4 for 54″ wall. The average depth for inground pools is calculated by averaging the shallow and deep end depths. For example, a 3-foot shallow end with a 7-foot deep end average to 5 feet.
Round A/G Pool Volume Chart
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Oval A/G Pool Volume Chart
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Rectangle Inground Pool Volume Chart
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Do you have any questions about your pool size? Leave a comment down below and we’d be happy to answer you.
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