Pool pH Calculator
Calculate the exact amount of acid or base to adjust your pool's pH level for optimal swimmer comfort and chlorine effectiveness.
pH Calculator
Adjust your pool's pH level for comfort and chlorine effectiveness
Ideal Range: 7.4 - 7.6
pH affects chlorine effectiveness and swimmer comfort. Low pH causes corrosion; high pH reduces sanitizer effectiveness.
Pool Volume
20,000 gallons
pH Scale
6.5 (Acidic)
7.4-7.6
8.5 (Basic)
Amount to Add
19 fl oz
Muriatic Acid 31.45%
Tips
• Handle with care, add to water never water to acid
• Wait 4 hours and retest before adding more
About Pool pH
pH measures how acidic or basic your pool water is on a scale of 0-14. The ideal range for pools is 7.4-7.6, which matches the pH of human eyes and mucous membranes for comfortable swimming.
Why pH Matters
Low pH (below 7.2): Corrosive to equipment, etches plaster, irritates skin and eyes.
High pH (above 7.8): Reduces chlorine effectiveness, causes cloudy water, scale formation.
pH Adjustment Products
To lower pH: Muriatic acid (most effective) or dry acid (sodium bisulfate, safer to handle).
To raise pH: Soda ash (sodium carbonate) or borax (minimal effect on alkalinity).