pH Calculator
Convert between pH and [H⁺] with acidity classification.
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Introduction
pH Calculator — Convert between pH and [H⁺] with acidity classification. Enter Given, [H⁺] (mol/L) to get an instant, accurate result.
Formula
pH = −log₁₀[H⁺]. Conversely, [H⁺] = 10^(−pH).
Step-by-step
- Enter the Given.
- Enter the [H⁺] (mol/L).
- Click Calculate to see your result instantly.
Real-world example
Example: With Given = from_h, [H⁺] (mol/L) = 0.00001, the pH Calculator gives pH: 5, H Concentration: 0.00001, Acidity: Acidic.
Frequently Asked Questions
What pH values are acidic vs. basic?
Below 7 is acidic, 7 is neutral, and above 7 is basic (alkaline).
What does [H⁺] mean?
The molar concentration of hydrogen ions in solution, expressed in mol/L.
What inputs does the pH Calculator need?
You'll need to provide: Given, [H⁺] (mol/L). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the pH Calculator?
The pH Calculator applies the formula exactly as calculated — pH = −log₁₀[H⁺]. Conversely, [H⁺] = 10^(−pH). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the pH Calculator free to use?
Yes, the pH Calculator is completely free, requires no signup, and runs instantly in your browser.
About the pH Calculator
The pH Calculator uses a real, verifiable formula — pH = −log₁₀[H⁺]. Conversely, [H⁺] = 10^(−pH). — so results are accurate every time, not an approximation.