How much water is in your pool? You need it for chemicals and pumps.
Log in or create a free account to save your inputs and results, so you don't have to enter them again next time.🔒 No spam, ever. We never sell or share your details, and you can delete your history or account at any time. Privacy policy
Fill in the details and click Calculate to see your results.
This calculator is also in our free app. Sign in with the same account to keep your history in sync.
Pool volume = surface area × average depth. For a pool with a sloping floor, average the shallow and deep ends. Round pools use π × radius² and oval pools π × half-length × half-width.
Pool chemical doses are given per 10,000 gallons or per 10 m³, and the pump should filter the whole volume every 6–8 hours.
| Units | Feet & inches |
| Pool shape | Rectangle |
| Length or diameter (ft or m) | 32 |
| Width (ft or m) | 16 |
| Shallow end depth (ft or m) | 3.5 |
| Deep end depth (ft or m) | 8 |
| Hose flow rate (US gal/min, optional) | 0 |
| Pool volume | 22,023 US gallons · 83,365 litres |
| Cubic metres | 83.36 m³ |
| UK gallons | 18,338 |
| Surface area | 512 sq ft · 47.57 m² |
| Average depth | 1.75 m (5.75 ft) |
| Turnover with a pump | Size the pump to filter the full volume in 6–8 hours: 46–61 gal/min |
22,023 US gallons · 83,365 litres.
| Units | Metres & centimetres |
| Pool shape | Round |
| Length or diameter (ft or m) | 4.5 |
| Width (ft or m) | 16 |
| Shallow end depth (ft or m) | 1.2 |
| Deep end depth (ft or m) | 1.2 |
| Hose flow rate (US gal/min, optional) | 0 |
| Pool volume | 5,042 US gallons · 19,085 litres |
| Cubic metres | 19.09 m³ |
| UK gallons | 4,198 |
| Surface area | 171.2 sq ft · 15.9 m² |
| Average depth | 1.2 m (3.94 ft) |
| Turnover with a pump | Size the pump to filter the full volume in 6–8 hours: 11–14 gal/min |
5,042 US gallons · 19,085 litres.
About 22,000 US gallons with depths from 3.5 to 8 ft.
7.48 US gallons.
With a garden hose at 8–10 gal/min, a 20,000-gallon pool takes about 35–40 hours.
Big enough to turn over the whole volume in 6–8 hours.