Volume by water depth
| Water depth | US gallons | Litres |
|---|---|---|
| 40 in of water | 2,820 gal | 10,680 L |
| 42 in of water | 2,960 gal | 11,210 L |
| 44 in of water | 3,100 gal | 11,740 L |
Formula: 12 × 12 × 3.5 ft × 5.87 = 2,961 gal.
How many gallons is a 12 ft round × 48 in above-ground pool?
A 12 ft round above-ground pool with 48 in walls holds about 2,960 US gallons (11,210 L) when filled to 42 in of water, about 6 in below the top rail. Volume depends on the water depth, not the wall height, so measure your water and check the table.
Measure your own water depth
2,961gal
About 11,209 L
Average depth 3.5 ft
Formula: diameter² × average depth × 5.87.
- Pool shapes are never perfect. Treat this as within about 10%, and check it once by adding a known amount of salt or stabilizer and testing the change.
- Use this volume: Chlorine pH Shock All-in-one
Save this test and get reminded when it is time to retest.
Pool Calc for iPhoneComing soon to the App StoreDoses for this pool
| Job | Amount |
|---|---|
| Raise chlorine 1 ppm | 3.8 fl oz of 10% liquid chlorine |
| Stabilizer 0 → 30 ppm | 12 oz |
| Salt 0 → 3,200 ppm | 80 lb (2 bags) |
Full dose tables for a pool this size: liquid chlorine for 2,000 gallons, salt and stabilizer. Or put 2,961 gallons straight into the pool chemical calculator.
Check the number once
Manufacturer capacities are usually given at a stated fill level, and liners stretch. To confirm your real volume, add a known amount of salt or stabilizer and see how much the test reading moves: the volume that explains that change is your pool.
Questions
How many gallons does a 12 ft round × 48 in pool hold?
About 2,960 gallons at 42 in of water.
How many litres is a 12 ft round × 48 in pool?
About 11,210 L at 42 in (107 cm) of water.