Pool Capacity Calculator

Pool shape

Length (ft)

Width (ft)

Diameter (ft)Round pools only.

Average depth (ft)Leave blank to have it worked out as the mean of the shallow and deep end.

Shallow end depth (ft)

Deep end depth (ft)

Known volume (US gal)If you already know the volume, enter it here and the dimensions are ignored.

Chemical to dose

Current reading (ppm)

Target (ppm)

Chlorine product

Alkalinity product

Hardness product

Product strength from your label (%)Overrides the stored label strength. Use it when the tub in your hand is a different grade.

Volume

21,065 US gal

Pool Volume Calculator

Volume

2,816.00 ft3

Volume

79,740 L

Water surface area

512.00 ft2

Average depth used

5.500 ft

Worked out from NIST Special Publication 811 / NIST Handbook 44 (US gallon = 231 cubic inches exactly, so 1 cu ft = 1728/231 US gal) and 2 other sources.

Pool chemistry is a safety matter. Doses are computed from your measured water test and the product label strength you selected; always follow the EPA-registered label on the product you actually hold, never mix chemicals, add chemical to water rather than water to chemical, and retest before adding more. This engine does not decide whether a pool is safe to swim in.

How this is worked out

3 steps

Average depth = (3 + 8) / 2 = 5.5 ft
Volume = 32 x 16 x 5.5 = 2816 cu ft
US gallons = 2816 cu ft x 1728/231 = 21065.142857142855 gal (231 cu in per gallon, exact)

Results are general information, not financial, tax, legal, medical or engineering advice.