pH Calculator

Calculate pH, pOH, and ion concentrations with visual pH scale and acid/base classification.

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pH Value
[H⁺] Concentration (mol/L)
Use scientific notation: 1e-7 for 1×10⁻⁷
pOH Value
pH Value
[H⁺] (mol/L)
[OH⁻] (mol/L)
pOH Value
pH Scale
0 (Acidic) 7 (Neutral) 14 (Basic)
Solution Steps