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How many gallons in a pool?
A typical above-ground pool holds around 5,000 to 15,000 gallons. A typical in-ground pool holds around 15,000 to 30,000. Find your size below, or use the calculator for an exact shape.
Round pools
| Diameter | 42 in of water | 48 in of water |
|---|---|---|
| 12 ft | 2,961 | 3,384 |
| 15 ft | 4,627 | 5,288 |
| 18 ft | 6,662 | 7,614 |
| 21 ft | 9,068 | 10,364 |
| 24 ft | 11,844 | 13,536 |
| 27 ft | 14,991 | 17,132 |
| 30 ft | 18,507 | 21,151 |
| 33 ft | 22,393 | 25,592 |
Oval pools
| Size | 42 in of water | 48 in of water |
|---|---|---|
| 12 × 18 ft | 4,442 | 5,076 |
| 12 × 24 ft | 5,922 | 6,768 |
| 15 × 30 ft | 9,253 | 10,575 |
| 16 × 32 ft | 10,528 | 12,032 |
| 18 × 33 ft | 12,215 | 13,959 |
Rectangular in-ground pools
| Size | 3 to 5 ft | 3 to 6 ft | 3 to 8 ft |
|---|---|---|---|
| 12 × 24 ft | 8,618 | 9,695 | 11,849 |
| 14 × 28 ft | 11,729 | 13,196 | 16,128 |
| 15 × 30 ft | 13,465 | 15,148 | 18,514 |
| 16 × 32 ft | 15,320 | 17,235 | 21,065 |
| 18 × 36 ft | 19,390 | 21,813 | 26,661 |
| 20 × 40 ft | 23,938 | 26,930 | 32,914 |
Water sits a few inches below the top of the wall, so a 48 in wall usually holds about 42 to 44 in of water. Use your real depth for chemical doses.