๐งช pH Converter
Calculated assuming an aqueous solution at 25ยฐC, where pH + pOH = 14.
pH3
pOH11
Hydrogen ion concentration [H+] (mol/L)1.000e-3 mol/L
Hydroxide ion concentration [OH-]1.000e-11 mol/L
Enter a pH value or hydrogen ion concentration [H+] (mol/L) to convert between them using the basic chemistry formula pH = -log10[H+], along with pOH and hydroxide ion concentration [OH-].
How to use
- Choose whether to calculate from pH or from concentration.
- Enter the value.
- pH, pOH, [H+], and [OH-] are calculated automatically.
FAQ
What formula is used for pH?
pH = -log10[H+], the negative base-10 logarithm of the hydrogen ion concentration [H+] (mol/L).
What is pOH?
A similar value derived from the hydroxide ion concentration [OH-]. In an aqueous solution at 25ยฐC, pH + pOH = 14.
Why is pH 7 considered neutral?
In pure water at 25ยฐC, [H+] = [OH-] = 1ร10โปโท mol/L, giving pH = pOH = 7. A pH below 7 is acidic, and above 7 is alkaline (basic).