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pOH Calculator
Calculate pOH and pH from a hydroxide ion concentration.
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Calculate pOH and pH from a hydroxide ion concentration.
pOH Estimator
Enter your numbers below for an instant estimate.
0
๐ก Tip: pH plus pOH equals 14 at 25 degrees Celsius.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
pOH Quick Guide
Typical values for reference.
| pOH | pH | [OH-] mol/L | Type |
|---|---|---|---|
| 1 | 13 | 0.1 | Strong base |
| 4 | 10 | 0.0001 | Base |
| 7 | 7 | 0.0000001 | Neutral |
| 12 | 2 | 1e-12 | Acid |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
pOH Calculator FAQ
Answers to common questions about this calculator.
Negative log of hydroxide concentration.
Sum to 14 at 25 C.
pH above 7.
Yes, the sum changes.