Here is a great tool to calculate the volume or capacity of your pool. Important!
Remember to measure from the depth of the water rather than the height of your wall.
More complicated pool shapes will require multiple calculations and adding them together. For more detailed information on the calculations, read more below the calculator. For additional help, contact a swimming pool professional.
Capacity calculations involve calculating surface area and volume of the pool or spa. This article describes in detail how to calculate the size and capacity of the pool you are planning. Calculating a pool’s area in square feet is the first step in determining information including pool gallons, maximum capacity of persons and other important information about your pool.
Standard In-Ground Pool Volumes in Gallons by Size | ||||
|---|---|---|---|---|
| Pool Size (in feet) | 3.5 ft Avg Depth | 4 ft Avg Depth | 4.5 ft Avg Depth | 5 ft Avg Depth |
| 12×24 | 7,600 | 8,600 | 9,700 | 10,800 |
| 14×28 | 10,300 | 11,800 | 13,200 | 14,700 |
| 15×30 | 11,800 | 13,500 | 15,200 | 16,900 |
| 16×32 | 13,400 | 15,400 | 17,300 | 19,200 |
| 18×36 | 17,000 | 19,400 | 21,900 | 24,300 |
| 19×38 | 19,000 | 21,700 | 24,400 | 27,100 |
| 20×40 | 21,000 | 24,000 | 27,000 | 30,000 |
| 22×44 | 25,400 | 29,000 | 32,700 | 36,300 |
| 25×45 | 29,531 | 33,750 | 37,968 | 42,187 |
| 25×50 | 32,800 | 37,500 | 42,200 | 46,900 |
| 30×50 | 39,375 | 45,000 | 50,525 | 56,250 |
Above Ground Swimming Pool Water Volumes in Gallons by Size | ||
|---|---|---|
| Size | 48in Wall | 52in Wall |
| 12ft Round | 2,975 gals | 3,398 gals |
| 15ft Round | 4,646 gals | 5,310 gals |
| 18ft Round | 7,646 gals | 8,602 gals |
| 21ft Round | 9,106 gals | 10,408 gals |
| 24ft Round | 11,895 gals | 13,594 gals |
| 27ft Round | 15,054 gals | 17,205 gals |
| 30ft Round | 18,585 gals | 21,240 gals |
| 33ft Round | 22,488 gals | 25,700 gals |
| 12x24ft Oval | 5,948 gals | 6,797 gals |
| 15x30ft Oval | 9,293 gals | 10,620 gals |
| 16x32ft Oval | 10,573 gals | 12,084 gals |
| 18x33ft Oval | 12,267 gals | 14,019 gals |