Molarity Calculator
Moles, mass and concentration for any solution.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Molarity
- 1 mol/L
- Moles of solute
- 1 mol
- Millimolar
- 1000 mM
- Mass percent (aqueous, approx)
- 5.844%
Working
- 1moles = 58.44 ÷ 58.44 = 1
- 2M = 1 ÷ 1 = 1
Quick answer
Molarity is moles of solute per litre of solution: M = mass ÷ (molar mass × litres).
M = mass ÷ (MW × V)
How to use the Molarity Calculator
- 1Enter the mass of solute in grams.
- 2Add the molecular weight.
- 3Enter the final solution volume in litres.
Frequently asked questions
Molarity vs molality?
Molarity uses litres of solution and changes with temperature; molality uses kilograms of solvent and does not.
How do I dilute a stock solution?
Use M₁V₁ = M₂V₂ — multiply the stock concentration by the volume taken and divide by the final volume.