pOH Calculator
⚖ Acids, Bases & Equilibrium. Use the pOH formula to find poh, [oh⁻]: pick the value you want, type the others, and the answer updates as you go.
pOH11
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| pOH | no unit |
| [OH⁻] | mol/L |
Worked example
Find the poh when [OH⁻] = 1 × 10⁻¹¹ mol/L.
Using pOH = -log[OH^-]: pOH = 11.
Frequently asked questions
What is the formula for pOH?
pOH = -log[OH^-].
What do the letters stand for, and what units are used?
pOH, [OH⁻] in mol/L.
How do you calculate poh?
Put the values into pOH = -log[OH^-]. For example, with [OH⁻] = 1 × 10⁻¹¹ mol/L, poh = 11.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (poh, [oh⁻]) and fill in the others: it rearranges the formula for you.
