Moles to Grams Calculator Formula

Understand the math behind the moles to grams calculator. Each variable explained with a worked example.

Use the Moles to Grams Calculator

Formulas Used

Mass

grams = moles * molar_mass

Mass

kilograms = (moles * molar_mass) / 1000

Variables

VariableDescriptionDefault
molesNumber of Moles(mol)2
molar_massMolar Mass(g/mol)18.015

How It Works

How to Convert Moles to Grams

Formula

mass (g) = moles × molar mass (g/mol)

Multiply the number of moles by the molar mass to get grams.

Worked Example

Convert 2 moles of water (Mw = 18.015 g/mol) to grams.

moles = 2molar_mass = 18.015
  1. 01mass = moles × Mw
  2. 02mass = 2 × 18.015
  3. 03mass = 36.03 g

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