Molal Concentration Calculator

Find molality of a solution from solute and solvent.

About Molal Concentration Calculator

Molarity for Molal Concentration is the number of moles of solute per liter of solution, the standard way to express how strong a solution is. Concentration in moles per liter is what reaction stoichiometry needs, not mass per volume.

Formula

Molal Concentration

Concentration (M) = moles of solute / liters of solution

molarity: Moles of solute dissolved in each liter of solution

Worked example

With the default values below, Molal Concentration Calculator returns Concentration of 0.250. Change any input above and every figure here is recalculated in your browser.

Inputs used

Moles of soluteminimum 0: 0.5
Volume of solutionminimum 0 L: 2 L
Solute massminimum 0 g: 58.4 g

Results

Concentration: 0.250 mol/L
Moles per Gram: 0.0086
Mass per Liter: 29.200 g/L

Step by step

1Values used
2Molal Concentration
3Concentration= 0.250 mol/L
4Moles per Gram= 0.0086
5Mass per Liter= 29.200 g/L

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Molal Concentration calculated?

Concentration (M) = moles of solute / liters of solution Molarity for Molal Concentration is the number of moles of solute per liter of solution, the standard way to express how strong a solution is.

Why does Molal Concentration matter?

Concentration in moles per liter is what reaction stoichiometry needs, not mass per volume.

What values do I need to enter?

This calculator takes 3 inputs: Moles of solute, Volume of solution, Solute mass. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.