How many gallons in a 27 ft round pool?
A 27 ft round pool with a 52 in wall, filled to 46 in, holds about 16,418 gallons. That is 357 gal for every inch of water.
How to work it out
- 3.1416 × (27 ft ÷ 2)² = 573 sq ft
- Water depth: 52 in wall − 6 in = 46 in
- 572.6 sq ft × 3.833 ft × 7.48 = 16,418 gal
A 27 ft round is a big above-ground pool — 572 sq ft of water, more than many small inground pools. At over 16,000 gallons it needs inground-size chemical doses and a properly sized pump and filter.
Adjust for your project
- Gallons if filled to the top of the wall
- 18,560 gal
- Water depth
- 46 in
- Water surface
- 573 sq ft
- Water in each inch of level
- 357 gal
27 ft round pool by water depth (52 in wall)
| Water depth | Gallons at your water level |
|---|---|
| 42 in | 14,991 gal |
| 44 in | 15,704 gal |
| 46 in | 16,418 gal |
| 48 in | 17,132 gal |
| 52 in | 18,560 gal |
A 16,000-gallon above-ground pool
Each inch of water here is about 357 gallons, so the fill line matters: from 44 in to 48 in the volume runs from about 15,700 to 17,100 gallons.
- Chemicals. Multiply label rates per 10,000 gallons by about 1.6. A 3 ppm chlorine top-up is about 50 fl oz of 12.5% liquid chlorine.
- Salt. About 440 lb to reach 3,200 ppm from fresh water — eleven 40 lb bags.
- Pump. An 8-hour turnover is about 34 gpm; see what size pump for a 15,000 gallon pool for how that is sized.
- Base. A 27 ft pool needs a lot of level, compacted ground and sand; the 24 ft numbers on how much sand for a 24 ft above-ground pool scale up by about 1.27.
Smaller rounds: how many gallons in a 24 ft round pool and how many gallons in a 21 ft round pool.
Different size? Use the full Above-Ground Pool Gallons Calculator.
What you’ll need
- Hose water flow meterBudget price
Screws onto the hose and counts gallons, so you know exactly how much went in — and your real fill rate.
See options on Amazon (opens in a new tab) - Solar cover reelMid-range price
A cover that is a pain to take off doesn’t go back on. A reel makes it a one-person, two-minute job.
See options on Amazon (opens in a new tab) - Liquid pool chlorine (sodium hypochlorite)Budget price
Adds chlorine without stabilizer or calcium. Strength is printed on the label — commonly 10% or 12.5% — and it weakens with age and heat, so buy it fresh.
See options on Amazon (opens in a new tab)
As an Amazon Associate we earn from qualifying purchases. Links to products are affiliate links — they cost you nothing extra and help keep these calculators free.
Frequently asked questions
How many gallons in a 27 ft round pool 54 inches deep?
About 19,274 gallons with a full 54 in of water.
How many gallons in a 27 ft round pool 48 inches deep?
About 17,132 gallons.
Other common sizes
- How many gallons in a 24 ft round pool — 12,972 gal
- How many gallons in an 18x48 pool — 6,662 gal
- How many gallons in a 15x48 pool — 4,627 gal
- How many gallons in a 12x30 pool — 1,904 gal
- How many gallons in a 21 ft round pool — 9,932 gal
- How many gallons in a 15x30 oval pool — 11,519 gal
- How many gallons in an 18x33 oval pool — 15,039 gal
Sources
- NIST Handbook 44, Appendix C — General tables of units of measurement (opens in a new tab) — 1 US gallon = 231 cubic inches (7.48052 gallons per cubic foot).
- Intex — Ultra XTR Frame 24 ft × 52 in pool (product page) (opens in a new tab) — Lists a water capacity of 12,481 gallons for a 24 ft × 52 in pool; the fill depth is not stated.
- Intex — Ultra XTR Frame 18 ft × 52 in pool (product page) (opens in a new tab) — Lists 6,981 gallons.
- Intex — Ultra XTR Frame 16 ft × 48 in pool (product page) (opens in a new tab) — Lists “5,061 gallons (90%)” — capacity at 90% of the wall height.