Hydrogen Ion Concentration Calculator

Find [H⁺] from pH.

[H⁺] (mol/L) 0.0001

Formula: [H⁺] = 10^(−pH)

Step-by-step with your numbers:

1. Values used:

2. pH = 4

4. [H⁺] = 0.0001mol/L

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Find the hydrogen ion concentration from a pH value.

The math behind it

[H⁺] = 10^(−pH). Each pH unit is a 10× change in concentration.

pH 4 → [H⁺] = 1 × 10⁻⁴ mol/L.

Reverse?

pH = −log₁₀[H⁺] (use the pH calculator).