Hydrogen Ion Calculator Formula
Understand the math behind the hydrogen ion calculator. Each variable explained with a worked example.
Formulas Used
[H+] Concentration
h_conc = pow(10, -ph_val)Variables
| Variable | Description | Default |
|---|---|---|
ph_val | pH | 3 |
How It Works
How to Calculate [H+] from pH
Formula
[H+] = 10^(-pH)
The inverse of the pH equation.
Worked Example
Find [H+] for pH = 3.
ph_val = 3
- 01[H+] = 10^(-3)
- 02[H+] = 0.001 M
Frequently Asked Questions
What does [H+] represent?
The molar concentration of hydrogen ions (or more precisely, hydronium ions H3O+) in solution.
How does [H+] change with each pH unit?
Each pH unit represents a 10-fold change. pH 3 has 10× more H+ than pH 4.
What is [H+] at neutral pH?
At pH 7: [H+] = 10^-7 = 0.0000001 M.
Ready to run the numbers?
Open Hydrogen Ion Calculator