pH Calculator
Calculate pH from hydrogen ion concentration
About this calculator
This pH calculator converts hydrogen ion concentration [H+] values into pH measurements, providing quick and accurate results for chemistry students, lab technicians, and professionals. pH is a logarithmic scale that measures acidity or alkalinity, where lower values indicate acidic solutions and higher values indicate basic solutions. Understanding pH is essential for water treatment, food production, medical diagnostics, and environmental monitoring, making this calculator an invaluable tool for scientific calculations.
How to use
Enter the hydrogen ion concentration in molarity (mol/L) or scientific notation format. The calculator automatically computes the pH using the formula pH = -log[H+]. Results display immediately, showing the corresponding pH value on the 0-14 scale for easy interpretation and analysis.
Frequently asked questions
What is the relationship between hydrogen ion concentration and pH?
pH equals the negative logarithm of hydrogen ion concentration. Higher [H+] means lower pH (more acidic), while lower [H+] means higher pH (more basic).
Can I enter very small concentration values?
Yes, the calculator accepts scientific notation (like 1.5e-8) for very small hydrogen ion concentrations commonly found in chemistry and environmental testing.
What pH range can this calculator handle?
The calculator works for the full pH range from 0-14 and beyond, accommodating any positive hydrogen ion concentration value you input.