Optional pool-size help

About how many gallons?

Enter the inside pool measurements in feet, using the water depth rather than the wall height. Decimal measurements work too: 4.5 feet means 4 feet 6 inches.

For a flat bottom, use the water depth. For a roughly uniform slope, average the shallow and deep water depths. Steps, shelves, deep wells and irregular shapes need a more detailed estimate.

This is an approximate volume for a simple rectangular or round pool. The office confirms sizing for your quote. Your estimate does not select a service, set a price or change your saved selections.

How the estimate works

Rectangular: length × width × average water depth × 7.48. Round: π × (diameter ÷ 2)² × average water depth × 7.48. The result is approximate US gallons.

These methods follow the area-and-depth approach in Pentair’s engineering manual. Rounded measurements and the pool’s actual floor shape affect the result.

If a guide opened this page, return to its original tab when ready. You can still choose “I’m not sure” and ask the office for help.

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