pH Calculator

Calculate pH, pOH, hydrogen ion concentration, and hydroxide concentration. Determine if a solution is acidic, neutral, or basic.

Solve For

Concentration (mol/L)

pH Value

pOH11

[H⁺] (mol/L)0.001

[OH⁻] (mol/L)0

ClassificationAcidic

How to Use This Calculator

Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
Solve For — The variable to solve for. Choose from: pH from [H⁺], [H⁺] from pH, pOH from [OH⁻]. default: 0.
Concentration (mol/L) — Molar concentration of H⁺ or OH⁻ ions. Accepts values from 1e-7 to 10 (default: 0.001).
pH Value — Used when solving for H⁺ from pH. Accepts values from 0 to 14 (default: 7).
Once all inputs are set, review your results in the Results panel. Here's what each output means:
pH — shown as a numeric value. This is the primary result of this calculator.
pOH — shown as a numeric value.
[H⁺] (mol/L) — shown as a numeric value.
[OH⁻] (mol/L) — shown as a numeric value.
Classification — your calculated result.
Check the Common Substance pH Values for a detailed row-by-row breakdown. This is useful for spotting trends or finding values at specific points.
Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.

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