Normality of Acid Calculator
Enter molarity and n-factor to instantly calculate the normality of any acid solution.
Inputs
mol/L
n-factor = 1 for HCl
Common Acid n-Factors
| Acid | n-Factor | Note |
|---|---|---|
| HCl | 1 | Monoprotic |
| HNO₃ | 1 | Monoprotic |
| H₂SO₄ | 2 | Diprotic (both H⁺) |
| H₂SO₃ | 2 | Diprotic |
| H₂C₂O₄ | 2 | Oxalic acid |
| H₃PO₄ | 1–3 | Triprotic; reaction-dependent |
Summary
Enter molarity and n-factor to instantly calculate the normality of any acid solution.
How it works
- Select a common acid (HCl, H2SO4, H3PO4) or choose Custom to enter any values.
- The molarity field accepts the molar concentration in mol/L.
- The n-factor field auto-fills for preset acids; adjust it for partial dissociation or custom acids.
- Click Calculate to see the normality and the step-by-step derivation.
- Use Reset to clear all fields.
Use cases
- Preparing standard acid solutions for acid-base titrations.
- Converting molarity to normality when the n-factor differs from 1.
- Comparing equivalent concentrations of different acids.
- Lab prep: determining how much concentrated H2SO4 to dilute for a target normality.
- Teaching or studying equivalent concentration concepts.
- Quickly checking normality values for HCl, H2SO4, or H3PO4 reagents.
Frequently Asked Questions
Last updated: 2026-06-18 ·
Reviewed by Nham Vu