pH Calculator

Calculate pH, pOH, hydrogen ion concentration, and hydroxide concentration. Determine if a solution is acidic, neutral, or basic.

Solve For

Concentration (mol/L)

pH Value

Tab to move between fields

pOH11

[H⁺] (mol/L)0.001

[OH⁻] (mol/L)0

ClassificationAcidic

How to Use This Calculator

Select the calculation mode: pH from [H+] concentration, pOH from [OH-], or solve from pH.
Enter the known concentration (mol/L) or the known pH/pOH value.
Review pH, pOH, hydrogen ion concentration, and hydroxide ion concentration.
pH + pOH = 14 at 25C -- use this to quickly find the conjugate value.
Use for acid-base chemistry, buffer preparation, and water quality assessment.

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