Pool pH level Calculator
A Swimming Pool Chemical Calculator
Adjust sliders to calculate pool pH.
PLEASE FILL IN ALL FIELDS!
Altering your pH will also alter your Total Alkalinity. Calculating pH requires knowledge of both Total Alkalinity and Borate. This calculator assumes a TA of 100 and a Borate of 0. Calculations are approximate, and for pH changes greater than 0.4, results can be off.
When adding chemicals, it is recommended to add half, wait for one full turnover, re-test/calculate and dose again as necessary.
READ: The Link Between Swimming Pool pH and Alkalinity: A Guide for New Pool Owners
RESULTS SHOWN HERE
More About Pool pH
Pool water pH is one of the best measures of balanced water. The pH of a human tear is 7.5, so the ideal range for best swimmer comfort is between 7.4 - 7.6. But 7.2 - 7.8 is also considered an acceptable pool water range. Maintaining proper pH levels is essential for swimmer comfort, protection of pool equipment and effectiveness of the chlorine.
Mastering the Art of pH Balance: A Comprehensive Guide to Maintaining Optimal pH Levels in Swimming Pools
LOW pH EFFECTS < 7.2:
Can cause etching of the pool or spa surface, corrosion of metals, chlorine loss, staining of stairs and walls, wrinkles in vinyl liners, and swimmer skin and eye irritation.
HOW TO RAISE pH IN POOL
To raise pH in pool use washing soda, dosa ash or Borax. Aerating the water will also raise pH in pool water. If the pool has a fountain or water feature, it can be run to raise the pool water pH. Use chemical reagents or test strips to find the current pH
HIGH pH EFFECTS > 7.8:
Can cause Clogged filters, reduced circulation, clogged heater elements, reduced chlorine effectiveness, and swimmer skin and eye irritation
HOW TO LOWER pH IN POOL:
To lower pH in pool use muriatic or dry acid. Both acids work the same, muriatic acid comes in a 1 gallon jugs and is equivalent to 1lb of dry acid. Add either chemical to the pool by pouring in the pool about 6 inches above the surface to avoid splashing. That's how to lower pH in pool.
Tips About Pool pH
Chlorine Effectiveness Based on pH:
| pH | Effective Free Chlorine |
|---|---|
| 6.0 | 97% |
| 7.0 | 75% |
| 7.2 | 63% |
| 7.5 | 49% |
| 7.6 | 39% |
| 7.8 | 28% |
| 8.0 | 3% |
Dive Into Clarity: A Guide to Different Types of Pool Test Kits and the Best Options for Accurate Readings
pH Drift:
pH drift is common and is due to a number of factors impacting the pool water. Salt water systems are one of the biggest reason for pH drifting up. Liquid chlorine also causes the pH to rise when added to the pool water. These both have a negative effect on the chlorine making the newly added chlorine less effective.
READ: CDC Healthy Swimming
READ: CDC Training and Contamination Response
READ: Poison Control
POOL CARE TIPS & FAQ
Save $100's of dollars with a few simple pool care tips. Check out our easy how too and pool maintenance blogs. You could save thousands of dollars and many hours of your time with a few simple steps.
POOL CHEMICAL CALCULATOR APP
Track and chart chemical test history for multiple pools. Save pool equipment configuration. Save operating notes, warranty details and manufacturer support info for each piece of equipment.