Swimming Pool Chlorine Dosing Calculator
Calculate the approximate amount of chlorine product required to raise free chlorine in a swimming pool.
1. Pool Volume
For a constant-depth pool, enter the same depth in both fields.
2. Free Chlorine
Enter the measured free chlorine concentration.
Use the target required by your pool operating standard or local regulation.
3. Chlorine Product
Verify the available-chlorine percentage on the product label.
Estimated Chlorine Product Required
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Pool Volume
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Chlorine Increase
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Available Chlorine Required
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Target Free Chlorine
Chlorine Dose: The calculator estimates how much available chlorine is required to increase free chlorine from the measured level to the target concentration, then converts that requirement into the approximate quantity of the selected chlorine product.
This calculator provides an approximate dosing quantity only.
Actual chlorine demand can vary with bather load, sunlight, pH,
cyanuric acid, organic contamination, temperature and water quality.
Test pool water after treatment and follow the chemical manufacturer’s
instructions and applicable public-health requirements. Never mix
different chlorine products or mix chlorine with acids.