Pool Ratio

27 ft round pool: how many gallons?

A 27 ft round pool with 4 ft of water holds about 17,130 US gallons (64,852 litres). Here is what that means for salt and chemicals.

Last updated · Checked against published product doses · How we calculate

Volume
17,130 gal
64,852 litres · 4 ft of water
Salt to 3,200 ppm (new salt pool)458 lb · 12 × 40 lb bags
10% liquid chlorine per +1 ppm22 fl oz
Stabilizer 0 → 40 ppm5.7 lb
Baking soda per +10 ppm alkalinity2.4 lb
Calcium chloride (77%) per +10 ppm33 oz

Open the chemical calculator for this pool →

The maths

  1. Area = π × 13.5² = 572.6 sq ft
  2. Volume = 572.6 × 4 = 2,290 cu ft
  3. 2,290 cu ft × 7.48 gal per cu ft

= 17,130 US gallons

Real pools vary: water levels sit a few inches below the wall top, floors slope and corners are rounded. If your pool’s depth differs, adjust it in the volume calculator.

Frequently asked questions

How many gallons is a 27 ft round pool?

About 17,130 US gallons (64,852 litres) with 4 ft of water.

How much salt does a 27 ft round pool need?

About 458 lb (208 kg) to bring fresh water to 3,200 ppm, or 12 bags of 40 lb. Check your salt cell’s target first.

How much chlorine does a 27 ft round pool need?

Each +1 ppm of free chlorine takes about 22 fl oz of 10% liquid chlorine. With stabilizer at 40 ppm, keep free chlorine around 4.6 ppm.

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