DOSING CALCULATOR

Enter the test readings — get the chemical and the dose.
Standard industry dosage rates (per 10,000 gal, scaled to the pool).

1 · The pool

Pool type

Pool size (gallons)

Don't know the gallons? Work it out from measurements

Shape

Length (ft)

Width (ft)

Shallow end (ft)

Deep end (ft)

Average depth = (shallow + deep) ÷ 2. Rectangle ×7.5 · Round (diameter) ×5.9 · Oval ×6.7. The result fills in the gallons box above.

2 · Test readings

Fill in what you tested — blank fields are skipped. FC and pH every visit; the rest as tested.

Free Chlorine (FC) ppm · ideal 1–3

Combined Chlorine (CC) ppm · ideal 0

pH ideal 7.2–7.8 · sweet spot 7.4–7.6

Total Alkalinity (TA) ppm · ideal 80–120

Calcium Hardness (CH) ppm · ideal 200–400

Stabilizer (CYA) ppm · 30–50 · salt 60–80

Pool is green / has algae (shock mode)

Safety — every time: never mix chemicals together, especially never chlorine with acid. Add one chemical at a time, pump running, in front of a return jet or broadcast in the deep end. Retest before stacking a second dose. Label doses are law — if the product label differs from this sheet, the label wins.