Calculate how much liquid chlorine to add to reach your target Free Chlorine (FC).
Enter your values and press Calculate.
This calculator determines how much liquid chlorine is required to raise your pool’s Free Chlorine (FC) level from its current value to your desired target.
1 gallon of X% liquid chlorine raises 10,000 gallons of water by X ppm. The calculator adjusts based on your pool size and chlorine strength.
Use this tool for routine chlorination, raising chlorine before a pool party, or restoring levels after heavy swimmer load or rain.