CalculatorAI
pH Calculator
biotechSolution Parameters
Accepts scientific notation (e.g., 1e-5)
scienceAnalysis
pH Level
--
calculate
Enter values to analyze
pH Calculator & Acidity Converter
pH is a measure of the acidity or basicity of a solution. It is defined as the negative base-10 logarithm of the hydrogen ion concentration [H+]. Our pH Calculator allows you to toggle between converting concentration to pH and pH to concentration.
The pH Formula
pH = -log[H+]
[H+] = 10^(-pH)
[H+] = 10^(-pH)
Understanding the Scale
- pH < 7: Acidic (e.g., Lemon Juice, Vinegar).
- pH = 7: Neutral (e.g., Pure Water).
- pH > 7: Basic / Alkaline (e.g., Soap, Bleach).
What is pOH?
pOH is similar to pH but measures the hydroxide ion [OH-] concentration. In standard conditions (25°C), the sum of pH and pOH is always 14.
help Frequently Asked Questions
What is the pH of pure water?
Pure water has a neutral pH of exactly 7.0 at 25°C.
How do I interpret the scientific notation?
Values like 1e-7 mean 1 x 10^-7, which is 0.0000001. This is standard format for very small concentrations common in chemistry.