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pH / pOH Calculator
pH / pOH Calculator
pH, pOH, [H⁺], and [OH⁻] with an acidity scale
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Known quantity
pH
pOH
[H⁺] concentration
[OH⁻] concentration
pH
pH + pOH = 14 · pH = −log₁₀[H⁺] · [H⁺][OH⁻] = 1.0×10⁻¹⁴
pH
3
pOH
11
[H⁺] concentration
1E-3
mol/L
[OH⁻] concentration
1E-11
mol/L
Solution is
Acidic
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Acidity scale from pH 0 (strongly acidic) to pH 14 (strongly basic) with a marker at the computed pH.
A colored pH scale; the marker shows where this solution falls between strongly acidic on the left and strongly basic on the right, with neutral water at pH 7.
Acidic
Neutral
Basic
0
2
4
6
8
10
12
14
pH 3
Acidic
pOH 11
