pH Calculator
Calculate pH, pOH, and ion concentrations for chemical solutions.
Enter a value to calculate pH, pOH, and concentrations.
About pH Calculator
The pH Calculator is a chemistry tool used to determine the acidity or alkalinity of a solution. It calculates pH, pOH, and the concentrations of hydrogen ions [H+] and hydroxide ions [OH-].
In chemistry, pH is a scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions (solutions with higher concentrations of H+ ions) are measured to have lower pH values than basic or alkaline solutions.
Chemical Formulas
pH = -log10[H+]
pOH = -log10[OH-]
pH + pOH = 14
[H+][OH-] = 10^-14