Mass to moles calculator

Calculate the moles of a substance in mol and more units, based on its molecular formula. Our quick and easy mass to moles calculator will help you find the answer in seconds!


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How to convert mass to moles?

To convert mass to moles, you need to know the molar weight of the substance you are working with. The molecular mass is the mass of 1 mole of that substance and is expressed in grams per mole (g/mol).and determines the given weight in grams then divide the mass by the molar mass then you get moles.

Mass to moles formula

n = M / Mwt

  • n = Number of moles
  • M = given mass
  • Mwt = Molecular weight (Molar weight)

Example of mass to moles

Example1:- Calculate mole given 20 grams of carbon (C)

Moles = Mass (in grams) / Molar mass (in g/mol) = 20 / 12 = 1.6667 mol

1.666 moles of 20 grams of carbon.

Example 2:- 35 grams of sodium chloride(NaCl). calculate the number of moles of sodium chloride.

Given mass = 35 gram of NaCl

Molar mass of Nacl = 58.44 g/mol

Moles = 35 / 58.44 = 0.599 moles

0.599 moles of sodium chloride

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