Revised planning calculator
Pool Alkalinity Calculator
Total alkalinity increase with nominally pure sodium bicarbonate. This does not predict pH or choose a target.
Enter your measured values
Total alkalinity increase with nominally pure sodium bicarbonate. This does not predict pH or choose a 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 sodium bicarbonate at nominal 100% purity; total alkalinity is reported as calcium carbonate (CaCO3). Not baking powder or blended products.
Testing and measurement
Start with reliable information
Use a total alkalinity titration test. Strips are useful for screening, not fine dosing.
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
Why Total Alkalinity Is the Most Ignored Number in Your Pool
The companion guide remains available for background reading. Its examples are not a personalized dose or a substitute for product instructions.
Read the guide