How Is Chlorine Dosage Calculated for a Pool?
Chlorine dosage is calculated based on pool volume (m³), water temperature, bather load, and the type of chlorine used. The target is 1–3 ppm free chlorine for private pools and 1–5 ppm for commercial/public pools. Accurate pool volume is essential for correct dosing.
Which Variables Drive the Dosage Calculation?
Pool volume (length × width × average depth), water temperature, sun exposure (UV accelerates chlorine loss), bather count, and the current cyanuric acid (stabilizer) level all directly affect chlorine demand. Chlorine depletes faster in warm, sunny pools, requiring more frequent replenishment.
Granular, tablet, liquid chlorine and salt chlorine generators each deliver different effective chlorine ratios, so the calculation must be based on the active-ingredient percentage stated on the product label.