Henderson–Hasselbalch
Calculate Henderson–Hasselbalch instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.
Henderson–Hasselbalch
pKa
[A−]
[HA]
Buffer pH
4.76
More about: Henderson–Hasselbalch
What it calculates
The “Henderson–Hasselbalch” calculator computes Buffer pH from 3 parameters: pka, [a−], [ha].
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters pKa = 4.76, [A−] = 0.1, [HA] = 0.1 the result is 4.76 (pH = pKa + log([A−]/[HA])).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.