Pool, Spa & Water Treatment Chemistry calculator

Chemical Feed Pump Setting Calculator

Convert a target treatment dose and water flow into an estimated metering pump feed rate based on stock concentration.

What this calculator does

  • Estimate chemical feed pump setting from required dose, flow, stock strength, and pump efficiency.
  • Use it to set metering pumps for sanitizer, acid, caustic, coagulant, or specialty treatment feeds.
  • Turns required treatment dose, feed solution concentration, treated water flow into a practical mL / min result for chemical feed pump setting.

Formula used

  • Feed pump setting = required dose / feed solution concentration x treated water flow in L/min

Inputs explained

  • Required treatment dose: Use the target applied dose for the treatment point.
  • Feed solution concentration: Convert product strength to active mg per mL. 10% sodium hypochlorite is 100 mg/mL. 12.5% is 125 mg/mL.
  • Treated water flow: Multiply flow in gpm by 3.785 to convert to liters per minute. For 60 gpm, enter 227.

How to use the result

  • Use it when planning pool, spa, aquatics, service-route, or water-treatment chemistry adjustments.
  • Use the result for planning math only. Follow product labels, health codes, local regulations, test-kit instructions, chemical safety rules, and qualified pool operator guidance before dosing water.

Common questions

  • What is the chemical feed pump setting calculator for? Estimate chemical feed pump setting from required dose, flow, stock strength, and pump efficiency.
  • What numbers do I need for chemical feed pump setting? You need required treatment dose, feed solution concentration, treated water flow. Use measured test results and the same pool, spa, tank, or treatment volume for every input.
  • How should I use the result? Use the result to check dose size, run time, flow, inventory, or operating cost before changing a treatment plan or purchase order.
  • What should I verify before acting? Verify water volume, units, chemical strength, product label directions, bather load, local code, and current test results. Retest after treatment and never mix incompatible chemicals.

Last reviewed 2026-05-12.