Pool Chemical Dosing Calculator
Calculate the exact amounts of chemicals to maintain your pool.
Clean and safe pool water isn't a matter of luck — it's the result of proper chemical dosing. The two key parameters you need to control are water pH (ideally between 7.2 and 7.6) and free chlorine level (between 1 and 3 mg/l).
Too much chlorine irritates skin and eyes, while too little allows bacteria and algae to develop. A similar issue arises with pH: too low acidity damages pool equipment, while too high reduces chlorine effectiveness. That's why precise dosing matters more than frequent chemical additions.
This calculator uses your pool volume and current pH and chlorine readings to determine the exact amounts of chemicals to add. Whether you use granular chlorine, liquid chlorine, pH plus, or pH minus — the result is tailored to the type of product.
Note: Always test your water before dosing. Test strips or digital testers provide reliable results for everyday maintenance.
Pool Volume
Or enter dimensions
pH Adjustment
Chlorine Dosing
Safety Warnings
- ⚠Always wear protective gloves and goggles when handling pool chemicals.
- ⚠Never mix different chemicals directly — always add them to water separately.
- ⚠Add chemicals to the pool when no one is swimming and let it circulate for at least 4 hours.
- ⚠Store chemicals in a dry, cool place, out of reach of children.
- ⚠Check pH and chlorine levels at least 2-3 times per week during the season.
Frequently Asked Questions About Pool Chemistry
- What is the ideal pH for a pool?
- The ideal pH for a pool is between 7.2 and 7.6. A value of 7.4 is considered optimal as it is close to the pH of human eyes and mucous membranes, reducing irritation.
- How much chlorine should a pool have?
- The recommended free chlorine level is between 1.0 and 3.0 mg/L (ppm). For regular maintenance, aim for 1.5-2.0 mg/L. Levels should never drop below 1.0 mg/L.
- When should you shock treat a pool?
- Shock treatment is recommended at the start of the season, after storms, when the pool has been heavily used, when water is cloudy or green, and once a week during hot summer days.
- Why is pool pH important?
- pH affects chlorine efficiency, swimmer comfort, and equipment longevity. Low pH can corrode equipment and irritate skin, while high pH reduces chlorine effectiveness and can cause cloudy water.
- How often should you check pool chemistry?
- During swimming season, pH and chlorine should be checked 2-3 times per week. Alkalinity and calcium hardness should be checked monthly. Do a complete water analysis at the start and end of the season.
