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.