About this calculator

1 g of 70% calcium hypochlorite raises 1 m³ of pool water by ~0.7 ppm free chlorine. Target 1–3 ppm; superchlorinate to 10 ppm to shock.

Frequently asked questions

What does the Pool Chlorine Dose Calculator do?

How much chlorine to add to reach the target free-chlorine level. 1 g of 70% calcium hypochlorite raises 1 m³ of pool water by ~0.7 ppm free chlorine. Target 1–3 ppm; superchlorinate to 10 ppm to shock.

Is the Pool Chlorine Dose Calculator free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Pool Chlorine Dose Calculator?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified swimming pool professional before committing to a purchase or a job.

What inputs does the Pool Chlorine Dose Calculator need?

Enter values for: Pool volume (m³), Current FC (ppm), Target FC (ppm). Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Pool Chlorine Dose Calculator on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.