pH calculator
- Classification
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pH = -log₁₀[H⁺] pH + pOH = 14 (at 25 °C)
How to use pH calculator
- Enter the hydrogen ion concentration [H⁺].
- pH calculates as −log₁₀[H⁺]. Since pH + pOH = 14 at 25°C, pOH derives automatically too.
About this tool
pH calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Science & Engineering. Browse more Science & Engineering tools.