Normality Calculator









🧪 How to Use the Normality Calculator?

Our Normality Calculator helps you calculate the normality of a chemical solution using two simple methods:

✅ Method 1: From Molarity- Use this when you already know the molarity of your solution.

🔹 What You Need to Enter?

  • The molarity value (e.g. in M, mM, µM)
  • The chemical compound (select from dropdown)
    • OR you can manually enter the n-factor if the compound is not listed

⚙️ How It Works:

  • When you select a compound, the calculator automatically retrieves the n-factor from its database.
  • The normality is calculated using the formula: Normality = Molarity × n-factor

What is n-factor?

The n-factor is the number of equivalents per mole of solute. It depends on the type of substance:
Acids: Number of H⁺ ions the acid can donate
e.g., H₂SO₄ → n-factor = 2

Bases: Number of OH⁻ ions the base can donate
e.g., Ca(OH)₂ → n-factor = 2

📌 Example:

Q: What is the normality of 1 M H₂SO₄?

✅ Select compound = H₂SO₄

✅ Enter: Molarity = 1 M

✅ Hit Calculate
➡️ The calculator retrieves H₂SO₄’s n-factor (2) and calculates: Normality = 1 × 2 = 2 N

✅ Method 2: From Mass of Solute- Use this when you know the mass of solute and the volume of the solution.

🔹 What You Need to Enter?

  • The weight of the solute (in g, mg, or µg)
  • The volume of the solution (in L, mL, or µL)
  • The chemical compound (select from dropdown)
    • OR manually enter the equivalent weight if needed

⚙️ How It Works:

  • When you select a compound, the calculator loads its equivalent weight automatically.
  • Then it calculates normality using the formula:
\[ \text{Normality (N)} = \frac{\text{Weight of solute (g)}}{\text{Equivalent Weight} \times \text{Volume (L)}} \] \[ \text{Equivalent Weight} = \frac{\text{Molar Mass}}{n} \]

📌 Example:

Q: What is the normality of 49 g H₂SO₄ in 1 liter of solution?
✅ Choose “From Mass of Solute”
✅ Select compound = H₂SO₄
✅ Enter: Weight = 49 g, Volume = 1 L
✅ Hit Calculate
➡️ The calculator retrieves H₂SO₄’s equivalent weight and computes the normality for you.

✅ Key Benefits:

  • No need to memorize or calculate n-factors or equivalent weights — we’ve already done that for you.
  • Unit conversion is automatic.
  • You can manually enter values if the compound isn’t in the list.