KBr (Potassium bromide) Molar Mass (With Calculations)

KBr (Potassium bromide) Molar Mass

Molar mass of KBr (Potassium bromide) is 119.002 g/mol.

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

But how can you get this value?

Let me show you the calculation to get the molar mass of KBr (Potassium bromide).

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

KBr (Potassium bromide) Molar Mass Calculation

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

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 KBr (Potassium bromide).

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 KBr, there is 1 Potassium atom and 1 Bromine atom.

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

You can see that;

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

The molar mass of Bromine is 79.904 g/mol. [2]

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

You can see that in KBr, there is 1 Potassium atom and 1 Bromine atom.

So, Molar mass of KBr = Molar mass of 1 Potassium (K) atom + Molar mass of 1 Bromine (Br) atom.
= 39.098 + 79.904
= 119.002 g/mol

Hence the Molar mass of KBr is 119.002 g/mol.

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


  • 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;
F2 Molar Mass
H2O2 (Hydrogen peroxide) Molar Mass
Al2O3 Molar Mass
Magnesium hydroxide [Mg(OH)2] Molar Mass
KI (Potassium iodide) 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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