How it works
Calculate solution concentration (molarity) from moles and volume, or derive any term from the other two.
Enter any two of moles (mol), volume (L), and molarity (M). The calculator derives the third using M = n ÷ V.
Formula
M = n ÷ V; n = M × V; V = n ÷ M.
n- Amount of solute (mol)
V- Solution volume (L)
M- Molarity (mol/L (M))
Examples
- 0.5 mol in 2 LMoles 0.5 · volume 2 L0.25 M
Frequently asked questions
What is molarity?
Molarity is moles of solute per litre of solution, the standard concentration unit in chemistry.
How do I get moles from mass?
Divide the mass in grams by the molar mass (g/mol). That step is not included here — enter moles directly.
How to read the result
A 1 M solution contains 1 mole of solute per litre of solution.
Limitations
Assumes solute fully dissolved; no density or mass-to-moles conversion.
Source: Molarity definition: M = n / V.