pOH Calculator Formula

Understand the math behind the poh calculator. Each variable explained with a worked example.

Use the pOH Calculator

Formulas Used

pOH

poh_value = -log10(oh_conc)

pH

ph_value = 14 - (-log10(oh_conc))

Variables

VariableDescriptionDefault
oh_concHydroxide Ion Concentration [OH-](M)0.01

How It Works

How to Calculate pOH

Formula

pOH = -log10([OH-])

And: pH + pOH = 14 (at 25 C)

Worked Example

[OH-] = 0.01 M.

oh_conc = 0.01
  1. 01pOH = -log10(0.01)
  2. 02pOH = 2
  3. 03pH = 14 - 2 = 12

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