Pool Free-Chlorine Dose by Product
Free-chlorine dose = ppm x (gal/1e6) x 8.34 lb, divided by the product available-chlorine fraction.
Example
You enter
- Target free-chlorine rise (ppm) 2
- Pool volume (gallons) 15000
- Product cal-hypo-65
You get
- Chlorine mass 0.25
- Dry (oz) 6.2
Details, formula, and sources
as dry oz or (liquid) fl oz. A 15,000 gal pool +2 ppm needs 6.2 oz of 65% cal-hypo, or 25.6 fl oz of 12.5% liquid. The product label governs.
lb_cl = ppm x (gallons/1e6) x 8.34; lb_prod = lb_cl / (avail/100); dry_oz = lb_prod x 16; liq_floz = (lb_prod/10) x 128.
The standard pool free-chlorine dose mass balance and product available-chlorine fractions, by name.
The 8.34 lb/gal water constant and product available-chlorine strengths are published free by pool-care references and product labels. The product label directions govern.
Estimate. AHJ and licensed professional govern.
Field names used by the API: ppm, gallons, product, lb_cl, dry_oz
- Mass balance lb chlorine = ppm x (gal/1e6) x 8.34; product weight = /available fractionpool-care practice
- Product strengths liquid 12.5%, cal-hypo 65%, dichlor 56%, trichlor 90%; liquid ~10 lb/galproduct labels
- No demand/CYA does not subtract chlorine demand or model the CYA effectscope of this tile