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Buffer pH Calculator

Result

Calculated result -2 Based on the values entered.
↗ Chemistry

Buffer pH Calculator (from [H+]) Find the pH of a solution from its hydrogen ion concentration. Enter the [H+] in moles per litre and the calculator returns pH using pH = −log₁₀[H+]. — free online calculator.

Formula

pH = -log[H+]
  • Buffer pH Calculator calculates its result from Logh Plus. It uses the formula pH = -log[H+]. Change any input to recalculate the result instantly.
  • The main inputs are Logh Plus. Enter them in the units and format shown in the calculator.
  • Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Buffer pH

Inputs
  • Logh Plus: 2

Using Logh Plus = 2, the calculated result is -2.

Sample result: Calculating…

Frequently asked questions

What does the Buffer pH calculate?

Buffer pH Calculator (from [H+]) Find the pH of a solution from its hydrogen ion concentration. Enter the [H+] in moles per litre and the calculator returns pH using pH = −log₁₀[H+]. — free online calculator.

Which values should I enter?

Enter Logh Plus using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: pH = -log[H+].

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 8, 2026