Chlorine Calculator for Swimming Pools

Calculate the precise chlorine dosage needed to maintain safe and clean pool water according to global standards

Calculate Chlorine Requirements

Chlorine Required:

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Enter values and click calculate

Chlorine Level Visualization

Visualize your current and target chlorine levels and see the required adjustment.

Note: The ideal chlorine range varies by country and pool type. Always test water before and after chemical adjustments. Never mix different chlorine types directly.

Global Chlorine Standards

Recommended free chlorine levels for swimming pools around the world:

United States (CDC)
1-3 ppm (Residential), 2-4 ppm (Commercial)
pH: 7.2-7.8, Cyanuric acid: 30-50 ppm
Australia
2-3 ppm (Outdoor), 3-5 ppm (Indoor)
pH: 7.0-7.8, Stabilizer max: 50 ppm
United Kingdom
1-3 ppm (Public pools), 2-5 ppm (Spa pools)
pH: 7.0-7.4, Combined chlorine max: 1 ppm
Canada
0.8-3.0 ppm (Residential), 1-5 ppm (Public)
pH: 7.2-7.8, Cyanuric acid max: 100 ppm
European Union
0.5-3.0 ppm (General), 1.5-3.0 ppm (Competition)
pH: 6.8-7.8, Free chlorine min: 0.5 ppm
South Africa
1-3 ppm (Standard), 3-5 ppm (High-use)
pH: 7.2-7.8, Cyanuric acid: 30-50 ppm
World Health Organization
1-3 ppm (Typical), 2-5 ppm (Warm climates)
pH: 7.2-7.8, Free residual chlorine min: 0.5 ppm

Remember: These are general guidelines. Always follow local regulations and manufacturer instructions for your specific pool type and usage.

This chlorine calculator for swimming pools provides estimates based on standard calculations. Actual requirements may vary based on water temperature, bather load, sunlight exposure, and other factors. Always test your pool water regularly and consult with pool professionals for specific advice.

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