pOH calculator
pOH from [OH⁻] or [OH⁻] from pOH; optional pH at 25 °C.
Calculator
How to use
pOH
$$\text{pOH} = -\log_{10}[\text{OH}^-]$$
At 25 °C, $\text{pH} + \text{pOH} = 14$ when using the usual ion-product convention.
Educational use only. Double-check values for labs, homework, and exams.