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Chlorine Dose Calculator

Enter test-kit FC and jug strength to get liquid chlorine in fluid ounces, cups, gallons, and dose cost. Dose at dusk.

Inputs

Inputs and assumptions

From the pool-volume calculator. Wrong gallons means wrong dose all season.

Free chlorine from a test kit today. Pools 1-3 ppm, spas 3-5 ppm.

Pools 1-3 ppm, spas 3-5 ppm. Dose at dusk.

Printed on the jug: household 6%, pool liquid 10-12.5%. Old jugs lose strength.

Store price for your strength; 0 to skip cost.

Result

Bleach (cups)
3.2
Dose cost (USD)
$1.20
Bleach needed (fl oz)
25.6
Bleach (gal)
0.20
Screening dose only. Never mix chemicals; dose at dusk; follow product labels and CDC pool-chemical safety guidance.

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Borax in pounds and 4-lb boxes for 30-50 ppm borates, plus cost. Borates buffer pH but never replace chlorine.

Outputs: Borax (20 Mule Team) (lbs) · 4-lb boxes · Borax cost (USD)

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Calcium Hardness Calculator

Calcium chloride in ounces and pounds for plaster 200-275 ppm. Confirm LSI after dosing to avoid scale.

Outputs: Calcium chloride needed (oz) · Calcium chloride (lb)

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Guides

01 Pool Chlorine Basics: Levels, Testing, and Safe Handling

Related articles

01 Pool Chlorine Basics: Levels, Testing, and Safe Handling 02 Salt System Care: Testing, Adding Salt, and Cell Maintenance 03 Water Balance Order: Adjust Alkalinity, pH, and Calcium Hardness

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