Molarity Calculator
Calculate molarity using M = n/V
How to Use
- Select what you want to calculate (molarity, moles, or volume)
- Enter the two known values in the input fields
- Optionally enter molar mass to calculate mass
- Choose the appropriate units for each value
- Click calculate to get the third value and mass
- View the results in multiple units for convenience
- Copy the results to your clipboard for later use
About This Tool
Our free molarity calculator uses the fundamental chemistry formula M = n/V (molarity equals moles divided by volume) to solve solution concentration problems. Whether you need to calculate molarity, moles of solute, or volume of solution, this calculator handles it all. It can also calculate the mass of solute when you provide the molar mass. Perfect for students, chemists, and anyone working with solution chemistry. The calculator supports multiple units including moles, millimoles; liters, milliliters; and molar (M), millimolar (mM). All calculations happen instantly in your browser with complete privacy.
Frequently Asked Questions
What is the molarity formula?
The molarity formula is M = n/V, where M is molarity (mol/L), n is the number of moles of solute, and V is the volume of solution in liters. Molarity measures the concentration of a solution.
What units does this calculator support?
Our molarity calculator supports moles and millimoles for amount of substance; liters and milliliters for volume; and molar (M) and millimolar (mM) for concentration.
Can I calculate mass from moles?
Yes, if you provide the molar mass (g/mol), the calculator can calculate the mass of solute needed. Mass = moles × molar mass.
What is the difference between molarity and molality?
Molarity (M) is moles of solute per liter of solution, while molality (m) is moles of solute per kilogram of solvent. Molarity is temperature-dependent, while molality is not.
