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How many gallons in a 15 ft round pool?
About 4,600 gallons (17,500 liters), with 42 in of water. A 15 ft pool is often an inflatable or frame pool. Those tend to run shallower than steel-wall pools, so check your real water depth.
| Water depth | Gallons | Liters |
|---|---|---|
| 36 in of water | 3,966 | 15,012 |
| 42 in of water | 4,627 | 17,514 |
| 48 in of water | 5,288 | 20,016 |
Surface area is 177 sq ft for the circle, and each extra inch of water adds about 110 gallons, so a level check is worth doing.
What this size needs
| Salt for a new salt system, to 3,200 ppm | 124 lb (4 × 40 lb bags) |
| 1 ppm of chlorine, 10% liquid | 6 fl oz |
| Shock to 10 ppm, 65% cal-hypo | 10 oz |
| Pump flow for an 8-hour turnover | 10 GPM |
| Fill time at 9 GPM | 8.6 hours |
Based on 4,600 gallons. For your exact volume, use the pool volume calculator.