Pool Ratio

12 ft round pool: how many gallons?

A 12 ft round pool with 4 ft of water holds about 3,380 US gallons (12,810 litres). Here is what that means for salt and chemicals.

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

Volume
3,380 gal
12,810 litres · 4 ft of water
Salt to 3,200 ppm (new salt pool)90 lb · 3 × 40 lb bags
10% liquid chlorine per +1 ppm4 fl oz
Stabilizer 0 → 40 ppm1.1 lb
Baking soda per +10 ppm alkalinity0.5 lb
Calcium chloride (77%) per +10 ppm7 oz

Open the chemical calculator for this pool →

The maths

  1. Area = π × 6² = 113.1 sq ft
  2. Volume = 113.1 × 4 = 452 cu ft
  3. 452 cu ft × 7.48 gal per cu ft

= 3,380 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?

About 3,380 US gallons (12,810 litres) with 4 ft of water.

How much salt does a 12 ft round pool need?

About 90 lb (41 kg) to bring fresh water to 3,200 ppm, or 3 bags of 40 lb. Check your salt cell’s target first.

How much chlorine does a 12 ft round pool need?

Each +1 ppm of free chlorine takes about 4 fl oz of 10% liquid chlorine. With stabilizer at 40 ppm, keep free chlorine around 4.6 ppm.

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