Calculate pH from hydrogen ion concentration. pH scale measures how acidic or basic a substance is.
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Enter Your Measurements
Results
pH
4.00
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Formula
pH = -log₁₀[H+]
How to Use This Calculator
How to Use
- 1
Enter the hydrogen ion concentration (M).
- 2
Calculate pH value.
Frequently Asked Questions
Frequently Asked Questions
What does the pH scale mean?
pH < 7 = acidic, pH = 7 = neutral, pH > 7 = basic. Each unit represents 10x change in H+ concentration.
What are examples of different pH values?
Pure water = 7, lemon juice ≈ 2, blood ≈ 7.4, baking soda ≈ 8.3
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About This Calculator
This calculator uses the formula: pH = -log₁₀[H+]. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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