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Molarity calculator
Calculate solution molarity from amount of substance and solution volume.
On this page
Molarity0.25mol/L
Calculator controls
How to calculate
Calculate solution molarity from amount of substance and solution volume.
Molarity = moles/litres
Worked example
Amount (mol): 0.5; Solution volume (L): 2.
Molarity: 0.25 mol/L.
Assumptions and limits
Use final solution volume, not solvent volume before mixing. Temperature and measurement uncertainty may matter.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Calculate solution molarity from amount of substance and solution volume. The displayed figures use the inputs and formula shown on this page.
When this tool is useful
Use the molarity to compare a scenario, check an estimate, or verify a manual calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| Amount (mol) | Enter a number of at least 0 and no more than 1000000000000. |
| Solution volume (L) | Enter a number of at least 0.000001 and no more than 1000000000000. |
Frequently asked questions
What should I check before using the molarity result?
Use final solution volume, not solvent volume before mixing. Temperature and measurement uncertainty may matter.
Is this molarity result exact?
It is exact for the stated mathematical model and entered values. Real-world results can differ when rates, timing, fees, definitions or measurement conditions differ.