Molarity Calculator
How to Use?
Choose what to solve for
Use the "Solve for" dropdown at the top — irrelevant inputs hide automatically.
Enter the known values
Fill in the remaining fields; choose units where shown. Reference tables are available for common compounds.
Click Calculate
The unknown variable appears highlighted in the results panel. Graphs update dynamically to show the relationships.
Worked Examples
NaCl — solve for molarity
Glucose — solve for mass
NaOH — solve for volume
FAQs
What does 1 M (one molar) mean?
It means 1 mole of solute dissolved in 1 litre of solution.
Do I need to convert units manually?
No. The calculator converts mg → g and mL → L automatically. Just select your preferred units from the dropdown.
Can I solve for mass or volume instead of molarity?
Yes — use the "Solve for" dropdown. Only the inputs you need are shown, and helpful diagrams appear alongside each field.
What is molar mass and where do I find it?
Molar mass is the mass of one mole of a substance (g/mol). It's found by adding up the atomic masses from the periodic table. A reference table of common compounds is provided below the molar mass input.
What do the graphs show?
The interactive graphs update when you click Calculate. They visualize the mathematical relationship between the variables — try changing values and recalculating to see how the relationships change.