Molar concentration online. Calculation of molality and molarity

You can make a calculation on this page, or you can download and install an Android application on your smartphone. The application allows you to calculate molarity, molality and molecular weight of compounds, it is equipped with some reference functions. d versions 4 to 13. It was not tested on versions older and younger. To switch to English, click the Globe button in the application interface.

Molar concentration

also called molarity, amount concentration or substance concentration, is a measure of the concentration of a solute in a solution, or of any chemical species, in terms of amount of substance in a given volume. A commonly used unit for molar concentration used in chemistry is mol/L. A solution of concentration 1 mol/L is also denoted as 1 molar (1 M).
The molar concentration is defined as the amount of a constituent (in moles) divided by the volume of the mixture.
The molecular weight of the solute - for example, for NaCl is 22.99 (molecular weight of Na)+35.44 (molecular weight of Cl), 23.99+35.45 = 58.44, thus, molecular weight of NaCl = 58.44
You can see molecular weight of chemical elements here (under the element's symbol)

Molecular weight of the solute
Molar concentration
Volume of the mixture, ml

Molar concentration Designation
10-1 dM
10-2 cM
10-3 mM
10-6 μM
10-9 nM
10-12 pM