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Buffer pH (Henderson–Hasselbalch)

Calculate Buffer pH (Henderson–Hasselbalch) instantly with the exact formula and a worked example.

Buffer pH (Henderson–Hasselbalch)

pKa
[A−]/[HA]
pH
5.061
Calculate Buffer pH (Henderson–Hasselbalch) instantly with the exact formula and a worked example.

More about: Buffer pH (Henderson–Hasselbalch)

What it calculates

The “Buffer pH (Henderson–Hasselbalch)” calculator computes pH from 2 parameters: pka, [a−]/[ha].

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters pKa = 4.76, [A−]/[HA] = 2 the result is 5.06.

How to use

  1. Enter pka and [a−]/[ha] — each field above is adjustable with a slider.
  2. pH is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Buffer pH (Henderson–Hasselbalch) calculated?
The Buffer pH (Henderson–Hasselbalch) calculator computes pH from pka, [a−]/[ha]. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Buffer pH (Henderson–Hasselbalch) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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