pH Calculator
Calculate pH from hydrogen concentration
How to Use
Enter the H+ ion concentration. Click Calculate to find the pH.
Frequently Asked Questions
What is pH?
pH = -log[H+]. It measures acidity/alkalinity on a 0-14 scale. 7 is neutral, below 7 is acidic, above 7 is basic.
What is a neutral pH?
A pH of 7 is neutral (pure water at 25°C). Below 7 is acidic, above 7 is alkaline (basic).