KCl (Potassium chloride) Molar Mass (With Calculations)

KCl (Potassium chloride) Molar Mass

Molar mass of KCl (Potassium chloride) is 74.548 g/mol.

Well, now you have come to know the molar mass of KCl.

But how can you get this value?

Let me show you the calculation to get the molar mass of KCl (Potassium chloride).

If you are a visual learner like me, then here is a short one minute video for you.

KCl (Potassium chloride) Molar Mass Calculation

If you have a periodic table with you, then you can easily calculate the molar mass of KCl (Potassium chloride).

Because the molar mass of any molecule (or compound) can be calculated by simply adding the molar masses of individual atoms.

Now here we have to find the molar mass of KCl (Potassium chloride).

So for that, have a look at the periodic table given below.

You can see the molar mass value of all the atoms from this periodic table.

Now in KCl, there is 1 Potassium atom and 1 Chlorine atom.

So let’s look at the molar mass of Potassium and Chlorine from the above periodic table.

You can see that;

The molar mass of Potassium is 39.098 g/mol. [1]

The molar mass of Chlorine is 35.45 g/mol. [2]

This image has an empty alt attribute; its file name is chlorine.jpg

Now, to calculate the molar mass of KCl, you just have to add the molar mass of all the individual atoms that are present in KCl.

You can see that in KCl, there is 1 Potassium atom and 1 Chlorine atom.

So, Molar mass of KCl = Molar mass of 1 Potassium (K) atom + Molar mass of 1 Chlorine (Cl) atom.
= 39.098 + 35.45
= 74.548 g/mol

Hence the Molar mass of KCl is 74.548 g/mol.

I hope you have understood the short and simple calculation for finding the molar mass of KCl.


  • In some books, you may see the unit of molar mass as grams/mole or g/mole. But all these units (i.e g/mol, grams/mole and g/mole) are the same. 
  • Always follow the calculation order to avoid any mistakes in calculation. First solve the brackets, then multiplications and at last do the final addition.
  • And don’t forget to put the unit g/mol to your final calculated molar mass.

Check out other related topics for more practice;
Acetic acid (CH3COOH) Molar Mass
Sodium carbonate (Na2CO3) Molar Mass
NaHCO3 (Sodium bicarbonate) Molar Mass
Aluminum sulfate [Al2(SO4)3] Molar Mass
Sucrose (C12H22O11) Molar Mass


Jay is an educator and has helped more than 100,000 students in their studies by providing simple and easy explanations on different science-related topics. With a desire to make learning accessible for everyone, he founded Knords Learning, an online learning platform that provides students with easily understandable explanations.

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