Interactive Calculator · 2026
Chemical Requirement Calculator
Work out how much dosing chemical an STP consumes and what it costs. Enter the treated flow, the target dose in mg/L, and the chemical's unit cost — get the requirement in kg/day, kg/month and the monthly rupee spend.
Daily vs monthly chemical consumption (kg)
Your dosing inputs
Volume of water the chemical is dosed into.
Delivered price of the chemical per kilogram.
Concentration to maintain — 1 mg/L is the same as 1 ppm (1 g per m³).
Daily vs monthly consumption
A month (30 days) at this dose needs ≈60 kg of chemical.
Chemical consumption scales directly with both the flow you treat and the dose you hold — doubling either doubles the drum count you order.
At Rs 40/kg that's about Rs 2,400 a month for this one chemical — a recurring line in the STP's operating budget.
How this is calculated
- Per day = flow × dose ÷ 1000 = 200 × 10 ÷ 1000 = 2 kg/day.
- Per month = kg/day × 30 = 2 × 30 = 60 kg/month.
- Monthly cost = kg/month × unit cost = 60 × Rs 40 = Rs 2,400.
Indicative consumption for concept planning. Actual dose varies with influent quality, jar-test results and product strength — confirm with your chemical supplier and STP operator before procurement.
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