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Pool Chemical Calculator

Per-10,000-gallon dosing rates, scaled to YOUR pool.

Chemical labels say "per 10,000 gallons" and every pool is a different size — that gap is where algae and scale come from. This calculator applies the standard industry dosing rates (10.7 oz of 12.5% liquid chlorine per ppm FC, 1.5 lb baking soda per 10 ppm TA, 13 oz stabilizer per 10 ppm CYA) scaled exactly to your volume, with the handling warnings that matter.

Why people use this

Pool owners and route techs use this on every green-to-clean and every new account: the per-10k label rates are universal, but nobody's pool is 10,000 gallons. The CYA warnings (dichlor adds stabilizer, nothing removes it) prevent the most expensive chemistry mistake in the hobby.

How it works

1. Enter your pool volume in gallons (use the Pool Volume calculator if unsure).
2. Pick the chemical and goal — chlorine, alkalinity, hardness, stabilizer, or pH.
3. Enter the adjustment size (e.g., 3 to raise FC by 3 ppm).
4. Read the exact dose, then retest in 4–6 hours.

Common questions

How much liquid chlorine do I add to raise FC by 3 ppm?

Per 10,000 gallons: 3 × 10.7 = 32 oz of 12.5% liquid chlorine (about a quart). A 20,000-gallon pool doubles that to 64 oz — roughly half a jug. Household 6% bleach needs about twice the volume of 12.5% liquid.

Why does my CYA keep climbing?

Trichlor tablets and dichlor granules are chlorine PLUS stabilizer — every puck adds roughly 0.6 ppm CYA. By late summer, tablet-fed pools often hit 100+ ppm CYA, where normal chlorine levels stop working. Liquid chlorine adds none. There is no chemical that lowers CYA: only partial drains and refills.

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