pH Calculator

Input: Concentration of H+ ions (in mol/L).
Convert: Alternatively, calculate pH from pOH or [OH-].
Result: See the pH value.

Acidity and alkalinity.

[H+] Concentration (M)

[OH-] Concentration (M)

pOH

Enter ANY ONE value to calculate related pH metrics (Logic currently supports H+ to pH priority).

How to use pH Calculator

The pH Calculator determines the acidity or alkalinity of a solution based on the concentration of hydrogen ions [H+].

pH = -log[H+]. A pH below 7 is acidic, 7 is neutral, and above 7 is basic. Vital for biology, swimming pool maintenance, and food science.