Frequently Asked Questions
How much chlorine raises free chlorine by 1 ppm?
Per 10,000 gallons, roughly 10.7 fl oz of 12.5% liquid chlorine, about 2 oz by weight of 73% cal-hypo, or about 2.4 oz of 56% dichlor. The dose scales with volume and the ppm increase.
How do I calculate pool water volume?
For a roughly rectangular pool, gallons = length × width × average depth (in feet) × 7.48. The calculator can do this for you if you switch to the dimensions mode.
Is it safe to add pool chemicals myself?
Always test your water first, follow the product label, and add chemicals to water - never water to chemicals. Pre-dissolve cal-hypo and dichlor and add slowly. These are estimates; re-test after dosing.
Why is my chlorine demand higher than the estimate?
Cyanuric acid level, pH, sunlight, and bather load all affect how fast chlorine is consumed, so real-world demand can exceed the simple dosing math. Re-test and adjust after each addition.
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Estimates for informational purposes only.
Important Disclaimer: Estimates for informational purposes only.
This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.