Pool chlorine calculator
Enter your pool dimensions and the current and target chlorine levels. We tell you the exact amount of product you need, based on the chlorine type you use.
Your pool
Estimated volume: 0 L (0 m³)
Chlorine
Amount to add
Fill in your pool dimensions to see the result.
Indicative calculation. Always follow your product manufacturer’s instructions, as the actual concentration may vary.
Frequently asked questions
How much chlorine should I add to a pool?
It depends on the water volume and the chlorine level you want to reach. As a guide, raising 1 ppm in 1 m³ (1,000 litres) needs 1 gram of available chlorine; the amount of product varies with its concentration.
What is the difference between maintenance and shock chlorination?
Maintenance keeps free chlorine around 1-2 ppm. Shock chlorination raises chlorine to about 10 ppm to clear algae and contamination after a problem or heavy use.
How do I know my pool volume?
Multiply length × width × average depth for rectangular pools. This calculator does it for you for rectangular, round and oval pools.