Revised planning calculator
Pool Stabilizer Calculator
CYA increase with nominally pure granular cyanuric acid. Liquid stabilizers are unavailable. This does not determine an appropriate chlorine level or choose a CYA target.
Enter your measured values
CYA increase with nominally pure granular cyanuric acid. Liquid stabilizers are unavailable. This does not determine an appropriate chlorine level or choose a CYA target.
Use decimals, simple fractions such as 1/4, or grouped commas such as 10,000. Blank or invalid values never become defaults.
Method, supported products, and references
Concentration is approximated as mg/L. US gallons × 3.785411784 × selected ppm increase / 1000 gives grams of the measured constituent. Alkalinity and hardness use calcium-carbonate-equivalent conversion, then divide by the selected product assay. Ounces and pounds are weight units, never fluid volume.
Solid cyanuric acid at nominal 100% purity. Liquid conditioners, blends, and other strengths are unsupported.
Testing and measurement
Start with reliable information
Use a CYA turbidity test and read it in bright outdoor light with your back to the sun.
Keep the product label available, never mix pool chemicals together, and ask a qualified pool professional if you are unsure how to interpret a reading.
Companion Guide
How CYA Protects Your Chlorine
The companion guide remains available for background reading. Its examples are not a personalized dose or a substitute for product instructions.
Read the guide