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Grams Moles Calculator Online

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In the realm of chemistry, computations and conversions are fundamental. One common calculation involves the conversion of grams to moles, a key concept especially when dealing with chemical reactions and stoichiometry. A Grams to Moles calculator simplifies this conversion process, making chemistry a tad less daunting for students and professionals alike.

The Formula

The Grams to Moles calculator is based on the formula:

n = m / M


  • n is the number of moles,
  • m is the mass in grams of the substance, and
  • M is the molar mass of the substance, typically given in grams per mole (g/mol).
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This formula comes from the definition of the mole in chemistry, which is based on the number of atoms in 12 grams of carbon-12, a quantity known as Avogadro’s number (~6.022 x 10^23).


To understand how this calculator works, let’s take an example. Suppose you have 58.5 grams of Sodium Chloride (NaCl) and you want to calculate the number of moles. We know the molar mass of Sodium Chloride is approximately 58.44 g/mol. Now, plugging these values into our formula, we get:

n = 58.5 / 58.44 = 1.001 mol

Therefore, 58.5 grams of Sodium Chloride is approximately equal to 1.001 moles.


A Grams to Moles calculator is a vital tool for anyone studying or working in the field of chemistry. It simplifies the process of converting grams to moles, a common requirement when dealing with chemical reactions. This simple calculator, powered by a straightforward formula, takes the mass and molar mass as inputs and outputs the number of moles.

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