Pool Ratio

12 ft round pool, 30 in deep: how many gallons?

A 12 ft round pool, 30 in deep with 2.5 ft of water holds about 2,120 US gallons (8,006 litres). Here is what that means for salt and chemicals.

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

Volume
2,120 gal
8,006 litres · 2.5 ft of water
Salt to 3,200 ppm (new salt pool)56 lb · 2 × 40 lb bags
10% liquid chlorine per +1 ppm3 fl oz
Stabilizer 0 → 40 ppm0.7 lb
Baking soda per +10 ppm alkalinity0.3 lb
Calcium chloride (77%) per +10 ppm4 oz

Open the chemical calculator for this pool →

The maths

  1. Area = π × 6² = 113.1 sq ft
  2. Volume = 113.1 × 2.5 = 283 cu ft
  3. 283 cu ft × 7.48 gal per cu ft

= 2,120 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 12 ft round pool, 30 in deep?

About 2,120 US gallons (8,006 litres) with 2.5 ft of water.

How much salt does a 12 ft round pool, 30 in deep need?

About 56 lb (26 kg) to bring fresh water to 3,200 ppm, or 2 bags of 40 lb. Check your salt cell’s target first.

How much chlorine does a 12 ft round pool, 30 in deep need?

Each +1 ppm of free chlorine takes about 3 fl oz of 10% liquid chlorine. With stabilizer at 40 ppm, keep free chlorine around 4.6 ppm.

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