Molarity Calculator

How to calculate molarity

1. Choose what to calculate: the mass, the concentration or the volume.
2. Type the formula or the molar mass, and the two known values with their units.
3. The answer appears as you type, along with the amount in moles.

Frequently asked questions

How do I make 500 mL of 0.1 M NaCl?

Choose Mass, type NaCl, 0.1 M and 500 mL. The answer is about 2.922 g, dissolved and made up to 500 mL.

What is molarity?

Moles of solute per liter of solution. A 1 M NaCl solution has 58.44 g of salt in each liter of solution.

Do I dissolve the solid in the full volume of water?

No. Dissolve it in less water, then add water up to the final volume, because the solid itself takes up some of the volume.