Molarity Calculator

Molarity measures how concentrated a solution is — the number of moles of dissolved substance (solute) packed into each liter of solution.

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What Is a Molarity Calculator?

Molarity measures how concentrated a solution is — the number of moles of dissolved substance (solute) packed into each liter of solution. It's the most common way chemists express concentration. Fill in any two of moles, volume, and molarity to find the third.

How to Use This Molarity Calculator

  1. Fill in any two of the three fields: Moles of Solute, Volume of Solution, and Molarity.
  2. Leave the value you want to solve for blank.
  3. Click Calculate to find the missing value.

Formula

Worked Example

Dissolving 2 mol of salt in 4 L of water. Molarity = 2 / 4 = 0.5 mol/L.

Frequently Asked Questions

What is molarity?

A concentration measure expressed as moles of solute per liter of solution.

How is molarity calculated?

Molarity (M) = moles of solute ÷ liters of solution.

How do I prepare a solution of specific molarity?

Calculate moles needed, convert to grams using molar mass, dissolve and dilute to final volume.

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