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pH from [H+]

Calculate pH from [H+] instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.

pH from [H+]

[H+]mol/L
pH
7
pH = −log₁₀[H+]Calculate pH from [H+] instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.

More about: pH from [H+]

What it calculates

The “pH from [H+]” calculator computes pH from 1 parameter: [h+] (mol/L).

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters [H+] = 0 mol/L the result is 7 (pH = −log₁₀[H+]).

How to use

  1. Enter [h+] — 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 pH from [H+] calculated?
The pH from [H+] calculator computes pH from [h+]. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the pH from [H+] 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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