Molarity Calculator
Calculate the molarity (M) of a solution from moles of solute and volume.
The Molarity Calculator determines the concentration of a solution in moles per liter (M). Molarity is the most common way to express solution concentration in chemistry.
Enter the number of moles of solute dissolved and the total volume of the solution in liters. The calculator divides moles by volume to give you the molarity. It also converts to millimolar (mM) for dilute solutions.
Molarity is critical for preparing laboratory reagents, titrations, and understanding reaction kinetics. A 1 M solution contains exactly one mole of solute per liter of solution.
Frequently Asked Questions
What is molarity?
Molarity (M) is the number of moles of solute per liter of solution. A 2 M NaCl solution has 2 moles of NaCl in every liter.
How is molarity different from molality?
Molarity uses liters of solution as the denominator, while molality uses kilograms of solvent. Molality does not change with temperature.
What is a millimolar solution?
A millimolar (mM) solution is one-thousandth of a molar solution. 1 mM = 0.001 M.