How many gallons is a 15x30 pool?
A 15 × 30 ft above-ground oval pool holds about 10,100–10,900 gallons, depending on the wall height.
On this page (7 sections)
By geometry at 90% fill, it holds about 10,800 gallons with a 48 in wall and 11,700 gallons with a 52 in wall. Real pools hold a little less. A 15 × 30 ft inground rectangle, 3.5–6 ft deep, holds about 16,000 gallons.
Quick answer for a 15x30
Which 15 × 30 do you have? The data block below treats it as an above-ground oval (straight sides with round ends) with a 48, 52, or 54 in wall. It also shows the frame-pool estimate (× 0.93). For a 54 in wall the estimate is 11,318 gallons. If your pool is an inground rectangle, skip to the next section.
| Wall height | Geometry (straight sides, round ends) | Frame pool estimate (× 0.93) |
|---|---|---|
| 48 in wall | 10,818 gal40,951 L | 10,061 gal |
| 52 in wall | 11,720 gal44,364 L | 10,899 gal |
| 54 in wall | 12,170 gal46,070 L | 11,318 gal |
Oval above-ground pools are a rectangle with two half-circle ends. A true ellipse holds less.
| Change | Amount |
|---|---|
| +1 ppm FC (12.5% liquid chlorine) | 11 fl oz330 mL |
| +10 ppm TA (baking soda) | 1.55 lb693 g |
| +10 ppm CYA (stabilizer) | 14.6 oz413 g |
Closest full chart: 10,000 gal dose chart.
Always follow your product’s label directions. Pool and spa chlorine, bromine, shock and algaecides are EPA-registered pesticides: use products labeled for pool or spa use, and don’t swim or soak until levels are within the limit on your product’s label. If this page and a label disagree, the label wins.
Above-ground oval vs inground rectangle
Same two numbers, three different pools. A 15 × 30 ft rectangle has 450 square feet of water surface. An above-ground oval of that size is a 15 × 15 ft rectangle with a half circle on each end. The rounded ends cut the area to about 402 square feet, 11% less. A true ellipse, the shape some calculators assume, cuts it further, to about 353 square feet.
| Pool | Depth | Gallons |
|---|---|---|
| Above-ground oval, round ends | 52 in wall, 90% fill | 11,720 gal (estimate 10,899) |
| True ellipse | 52 in wall, 90% fill | 10,311 gal |
| Inground rectangle, flat | 4 ft | 13,465 gal |
| Inground rectangle, sloped | 3.5–6 ft | 15,990 gal |
| Inground rectangle, sloped | 3.5–8 ft | 19,356 gal |
If you run an oval pool through an ellipse formula, you undercount by about 12% and every dose comes out short. The calculator lets you pick either oval type.
We don't yet have a manufacturer's listed capacity for a 15 × 30 oval. If your manual lists one, use it. Otherwise, the frame estimate is a reasonable place to start.
Starting doses for this volume
| Change | Oval, 52 in (10,899 gal) | Inground, 3.5–6 ft (15,990 gal) |
|---|---|---|
| +1 ppm FC, 12.5% liquid chlorine | 11 fl oz | 16 fl oz |
| +1 ppm FC, 6% household bleach | 22 fl oz | 33 fl oz |
| +10 ppm TA, baking soda | 1.55 lb | 2.25 lb |
| CYA 0 to 30 ppm, stabilizer | 2.75 lb | 4.0 lb |
Always follow the product label. It is a violation of federal law to use a pesticide product in a manner inconsistent with its labeling.
Full dose sheets near these volumes: 12,000 gallons for a 54 in oval and 15,000 gallons for the inground pool.
Calculator: your exact depth
The calculator opens as a 30 × 15 ft oval with a 52 in wall. Choose "True ellipse" only if your pool's sides curve all the way around with no straight section.
Fill time and water cost
Fill time is gallons ÷ hose flow. At 5 gallons per minute, the 10,899-gallon oval takes about 36 hours; at 10 gallons per minute, about 18. At the same flow rates, the inground pool (15,990 gallons) takes about 53 or 27 hours. Water cost is gallons ÷ 1,000 × your rate. For every $1 per 1,000 gallons, expect about $10.90 for the oval and $15.99 for the inground pool. Rates vary by town. Also ask your utility whether sewer charges apply to water used to fill a pool. The fill cost calculator does the math with your own rate.
Safety. Pour chlorine and acid separately in front of a return jet with the pump running, at least 30 minutes apart. Never mix products or add water to chemicals. Poison Control: 1-800-222-1222.
FAQ
How many gallons in a 30x15 oval pool?
About 10,818 gallons with a 48 in wall, 11,720 with 52 in, and 12,170 with 54 in, by geometry at 90% fill. Frame pools typically hold about 7% less: 10,061, 10,899, and 11,318 gallons.
How much chlorine for a 15x30 pool?
Per 1 ppm: about 11 fl oz of 12.5% liquid chlorine for a 52 in oval, or 16 fl oz for an inground pool 3.5–6 ft deep. Multiply by the ppm between your reading and your target.
Sources
- Oval, ellipse, and rectangle formulas, correction factors, and dose math: methodology