Molarity Calculator
Calculate molar concentration from mass, volume and molar mass, and plan dilutions with the C1V1 = C2V2 formula. Free, instant and browser-based.
Über Molarity Calculator
The Molarity & Dilution Calculator handles the two calculations that dominate solution preparation. The first converts a mass of solute, its molar mass and a solution volume into molar concentration, along with the number of moles and the mass concentration in grams per litre. The second solves the dilution equation C₁V₁ = C₂V₂.
Molarity is moles of solute per litre of solution, and moles are mass divided by molar mass — so dissolving 58.44 g of sodium chloride (molar mass 58.44 g/mol) in one litre gives exactly 1 mol/L. If you need the molar mass of a compound first, work it out with the Molar Mass Calculator and bring the number back here.
The dilution section answers the everyday bench question: how much stock do I take, and how much solvent do I add, to reach a target concentration? It returns the final volume, the solvent to add and the dilution factor. Volumes are assumed additive, which holds well for dilute aqueous solutions.
So verwenden Sie Molarity Calculator
- Choose whether to calculate molarity from mass, or to plan a dilution.
- For molarity: enter the mass of solute, its molar mass in g/mol and the solution volume in mL.
- Read the molarity, the number of moles and the mass concentration.
- For a dilution: enter the stock concentration, the stock volume and the target concentration.
- Read the final volume, the solvent to add and the dilution factor.