Molarity Calculator - Calculator See


Molarity Calculator

Calculate solution molarity (M in mol/L), mass of solute (grams), and volume using solute molar mass.

Calculator Inputs

g
Weighed mass of chemical.
g/mol
Molar mass (e.g. NaCl = 58.44 g/mol).
mL
Final volume in milliliters.

Calculated Results

Solution Molarity
1.000 M (mol/L)
Moles of Solute 1.000 mol
Volume in Liters 1.000 L
Concentration in Millimolar (mM) 1,000 mM
Values calculate live as you adjust inputs.

About Molarity Calculator

Calculates the molar concentration of a chemical solution: Molarity (M) = Moles of Solute / Liters of Solution.

What is Molarity Calculator?

Calculates the molar concentration of a chemical solution: Molarity (M) = Moles of Solute / Liters of Solution.

How to Use This Calculator

  1. Enter solute mass in grams.
  2. Enter solute molecular weight (g/mol).
  3. Enter final solution volume in mL.
  4. Read molarity in mol/L.

The Mathematical Formula & Variables

Molarity (M) = (Mass / Molecular Weight) / (Volume in mL / 1000)

Step-by-Step Worked Example

Scenario: Dissolving 58.44 g NaCl (MW 58.44 g/mol) in 1,000 mL water.

  1. Moles = 58.44 / 58.44 = 1.00 mol.
  2. Volume in L = 1,000 / 1,000 = 1.0 L.
  3. Molarity = 1.00 / 1.0 = 1.00 M.

Result: 1.000 M

Frequently Asked Questions

What is the difference between molarity and molality?

Molarity (M) is moles of solute per liter of solution. Molality (m) is moles of solute per kilogram of solvent.