Molarity Calculator

What is Molarity?

Molarity (M) is a measure of the concentration of a solution, defined as the number of moles of solute per liter of solution. It's one of the most common ways to express concentration in chemistry and is essential for preparing solutions in laboratories.

The Formula

Molarity is calculated using:

M = n / V

Where:

• M = Molarity (mol/L or M)
• n = Amount of substance (moles)
• V = Volume of solution (liters)

Rearranged Formulas

How to Calculate Moles

To find the number of moles from mass:

n = mass (g) ÷ molar mass (g/mol)

Common Solution Concentrations

Practical Applications

• Laboratory Work: Preparing standard solutions for experiments
• Titrations: Determining unknown concentrations
• Pharmaceuticals: Drug concentration calculations
• Industrial Chemistry: Process control and quality assurance

Concentration Unit Conversions

• 1 M = 1 mol/L = 1000 mM
• 1 mM = 0.001 M = 1000 μM
• 1 μM = 0.000001 M = 1000 nM