How Many Gallons of Water Does the Average 21-Foot Swimming Pool Hold?

By Staff WriterLast Updated Apr 12, 2020 2:56:05 AM ET

The average 21-foot round pool with a depth of 48 inches holds 13,500 gallons of water. A 21-foot round pool with a depth of 52 inches holds 14,500 gallons, according to Robelle.

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