Chlorine Dosage Calculator
Enter your pool’s volume in gallons and your current free chlorine reading. The calculator will tell you the exact amount of 12.5% liquid chlorine (in ounces or cups) to add to reach your target. If your combined chlorine is elevated, it will recommend a shock dose instead — using calcium hypochlorite at the break-point ratio rather than a maintenance dose. Free, no signup.
Don’t know your pool’s gallons? Rectangle ≈ length × width × avg-depth × 7.5; round ≈ π × radius² × avg-depth × 7.5; freeform is roughly 0.45 × length × width × avg-depth × 7.5.
Current Readings
R-0015 acid demand reagent drops
Recommended Doses
Enter your pool volume to see dosage recommendations.