Chlorine Dose Calculator

Running a water plant and need accurate chlorine feed rates fast? Chlorine Dose Calculator converts your target dose and flow into exact chemical feed rates for any chlorine form — no more manual pound-per-day math. Enter flow rate (MGD), target chlorine dose, and current residual. Select your chemical form and instantly see feed rate, annual usage, and estimated chemical cost. CHEMICAL FORMS SUPPORTED: - Gas Cl2 (100%) — feed in lbs/day - Sodium Hypochlorite 12.5% — feed in gal/day - Sodium Hypochlorite 10% — feed in gal/day - Calcium Hypochlorite 65% — feed in lbs/day WHAT IT CALCULATES: - Demand dose from target minus residual - Daily feed rate in lbs/day or gal/day - Annual chemical usage - Estimated yearly cost per chemical type - CT value guidance per treatment type TREATMENT TYPES: - Drinking water — with CT compliance notes - Wastewater — permit-based contact time guidance - Pool and spa — residual maintenance dosing Built for water treatment plant operators, wastewater technicians, and pool service professionals. Works completely offline — no internet required.