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Chlorine reference

Chlorine Dosing Chart for 10% Liquid Chlorine

Use this chlorine dosing chart to estimate gallons of 10% liquid chlorine for common pool sizes and free chlorine ppm increases. It is a planning chart, not a product label replacement.

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Reference chart

Common values for quick planning.

These values are for planning and checking mental math. Use the matching calculator when your pool size, product strength, target range, or current test reading differs.

Pool volume+1 ppm+3 ppm+5 ppm+10 ppm
5,000 gal0.05 gal0.15 gal0.3 gal0.5 gal
10,000 gal0.10 gal0.30 gal0.5 gal1.0 gal
15,000 gal0.15 gal0.45 gal0.7 gal1.5 gal
20,000 gal0.20 gal0.60 gal1.0 gal2.0 gal
25,000 gal0.25 gal0.75 gal1.3 gal2.5 gal
30,000 gal0.30 gal0.90 gal1.5 gal3.0 gal

How to use it

Treat chart numbers as a first pass.

Pick the closest pool size, check the matching column, then compare that number with your current test result and product label. If the adjustment is large, use the calculator and add in stages.

Pool volume errors multiply every chemical estimate. If the pool size is uncertain, use the volume calculator before relying on a dosing chart.

Reference FAQ

How to use this chart without overcorrecting.

Use chart values to orient the next step, then rely on fresh test results, calculator inputs, and product labels before adding chemicals.

Does this chart work for 12.5% liquid chlorine?

No. A stronger product needs less liquid. Use the calculator when the bottle label is 12.5%, 6%, or any strength other than 10%.

Can I use this chart for household bleach?

Only if the bleach is plain, unscented sodium hypochlorite and you adjust for its actual percentage. Splashless or scented products should not be used.

Does CYA change the dose formula?

CYA does not change the ppm dose formula, but it can change the free chlorine target you choose.

Why should I retest after adding chlorine?

Sunlight, algae load, product age, and test error can change the real result. Retesting keeps the next dose from becoming a guess.