pH Calculator
Convert between pH, pOH, hydrogen and hydroxide ion concentration. The result updates as you type, with the working underneath so you can check it.
Your details
I know the
Result
pH
3.00
Acidic
- pOH
- 11.00
- [H⁺]
- 0.001 mol/L
- [OH⁻]
- 1e-11 mol/L
- Valid for dilute aqueous solutions at 25 °C.
Good to know: pH = −log₁₀[H⁺]
Please note: For study and planning. Check calculations independently before using results with chemicals, electricity, pressure or machinery, and follow safety data sheets, manufacturer instructions and local regulations.
About this tool
Formula
pH = −log₁₀[H⁺]
Questions people ask
What pH is acidic or basic?
Below 7 is acidic, 7 is neutral and above 7 is basic at 25 °C. Each pH unit is a tenfold change in hydrogen ion concentration.
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How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it.
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