18 × 33 ft oval above-ground pool: gallons and litres
A standard 18 × 33 ft oval above-ground pool with a 52 in wall holds about 15,039 US gallons (56,930 litres) when filled 6 in below the top. Change the size or depth below to match your pool.
Gallons by wall height
| Wall | Water depth | US gallons | Litres | UK gallons | Water weight |
|---|---|---|---|---|---|
| 48 in | 42 in (107 cm) | 13,732 | 51,980 | 11,434 | 114,600 lb |
| 52 in | 46 in (117 cm) | 15,039 | 56,930 | 12,523 | 125,510 lb |
| 54 in | 48 in (122 cm) | 15,693 | 59,405 | 13,067 | 130,970 lb |
Filled right to the top of a 52 in wall it would hold 17,001 gallons — the figure some charts quote. Surface area: 524 ft² (48.7 m²).
Looking after 15,039 gallons
| Raise free chlorine by 1 ppm | 15.4 fl oz of 12.5% liquid chlorine (455 mL) — guidance, follow the label |
|---|---|
| Salt for a salt system (0 → 3,200 ppm) | 402 lb (182 kg), 11 × 40 lb bags |
| Pump flow for an 8-hour turnover | 31.3 GPM (7,116 L/h) |
| Fill time at 6 GPM | 41.8 hours |
| Evaporation at ¼ in a day | about 572 gallons a week |
Work out exact doses with the chlorine and salt calculators, and check your pump with the turnover calculator.
Questions
How many gallons is a 18 × 33 ft oval pool with a 52 in wall?
About 15,039 US gallons (56,930 litres) filled to 46 in, 6 in below the top of the wall. With a 48 in wall it is 13,732 gallons and with a 54 in wall 15,693.
How many litres is a 18 × 33 ft oval above-ground pool?
51,980 L with a 48 in wall, 56,930 L with a 52 in wall and 59,405 L with a 54 in wall (12,523 UK gallons for the 52 in wall).
How long does it take to fill a 18 × 33 ft oval pool?
About 41.8 hours with a 6 gallon-per-minute garden hose for the 52 in wall, or 25.1 hours at 10 GPM.