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Get NordVPN →Molarity Calculator (mol/L to moles)
Use this molarity calculator to find the moles of solute in a solution from its molar concentration and volume. Enter molarity in moles per liter (mol/L) and volume in liters (L) to get the result in moles (mol).
Enter molarity and volume to see the moles of solute.
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How it works
What is molarity?
Molarity is a measure of concentration that describes how many moles of solute are dissolved in one liter of solution. It is expressed in moles per liter (mol/L), often written as M.
To find the amount of solute, multiply the molarity by the volume of the solution: moles = molarity (mol/L) × volume (L).
When to use this calculator
This tool is useful in chemistry labs and classrooms whenever you know a solution's concentration and volume and need the number of moles of solute.
Knowing the moles lets you convert to mass using the molar mass, or plan dilutions and reactions accurately.
Frequently asked questions
›What is the molarity formula?
Moles of solute = molarity (mol/L) × volume (L). Rearrange it to solve for molarity or volume if needed.
›What units should I use?
Enter molarity in moles per liter (mol/L) and volume in liters (L). The result comes out in moles (mol).
›How do I convert milliliters to liters?
Divide the volume in milliliters by 1000. For example, 250 mL equals 0.25 L.
›How do I get the mass of solute?
Multiply the moles of solute by the molar mass (g/mol) of the substance to obtain the mass in grams.
›Is molarity the same as molality?
No. Molarity is moles per liter of solution, while molality is moles per kilogram of solvent.
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