pH Calculator
Calculate pH from hydrogen ion concentration and vice versa. Includes pOH calculator.
Embed this toolpH
7.00
pOH
7.00
Classification
Neutral
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The pH Scale
The pH scale measures how acidic or basic a substance is. It is logarithmic, meaning each whole number change represents a tenfold change in acidity.
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AcidicNeutralBasic
Frequently Asked Questions
pH is a measure of the acidity or basicity of a solution. It is defined as the negative logarithm of the hydrogen ion concentration: pH = -log[H⁺].
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