Interactive Calculator · 2026
Chlorine Dose Calculator
Work out the chlorine demand for disinfection of water or treated sewage. Enter the daily flow and the chlorine dose, and get the chlorine you need in kg/day — plus the monthly consumption to plan supply.
Chlorine demand (kg/day) across dose — your dose highlighted
Your disinfection inputs
Daily volume to be disinfected — the plant flow or water supplied per day.
Applied chlorine dose. Typical practice runs ≈2–6 mg/L for clean water and higher for treated sewage.
How this is calculated
- Chlorine per day = flow × dose ÷ 1000 = 200 × 5 ÷ 1000 = 1 kg/day.
- Chlorine per month = chlorine per day × 30 = 1 × 30 = 30 kg/month.
- Because 1 mg/L equals 1 g/m³, multiplying flow (m³/day) by dose (mg/L) gives grams per day; dividing by 1000 converts to kilograms per day.
Indicative chlorine demand for concept planning. Actual dosing must account for chlorine demand of the water, required residual and contact time — confirm with a qualified consultant before procurement.
Related Guides — Deep-dive reading
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