Science Calculators
pH Calculator
Enter a hydrogen ion concentration [H+] to calculate pH and see whether the solution is acidic, neutral, or basic.
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pH 7.00
Neutral
pH = -log₁₀[H⁺]. Pure water at 25°C has [H⁺] = 1×10⁻⁷ mol/L, giving pH 7 (neutral).
How to use this tool
- 1Enter the concentration coefficient and exponent.
- 2See the calculated pH and classification.
Frequently asked questions
What is the pH formula?+
pH = -log₁₀[H⁺], where [H⁺] is the hydrogen ion concentration in moles per liter.