Molecular Weight Calculator
Calculate molecular weight from a chemical formula with element breakdown.
Results
Molecular Weight
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| Element | Atomic Weight | Count | Total |
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What is Molecular Weight?
Molecular weight (or molar mass) is the sum of the atomic weights of all atoms in a molecule. It is expressed in grams per mole (g/mol) and is essential for stoichiometric calculations in chemistry.
How to Use This Calculator
- Enter a chemical formula such as H2O, C6H12O6, NaCl, or CO2.
- Click "Calculate Molecular Weight" to see the total and element breakdown.
Frequently Asked Questions
What formulas are supported?
This calculator supports basic chemical formulas without parentheses, such as H2O, NaCl, CO2, and C6H12O6.
Where do atomic weights come from?
Atomic weights are based on standard periodic table values, such as H=1.008, C=12.011, O=15.999, Na=22.990, and Cl=35.45.
What is the difference between molecular weight and molar mass?
They are numerically identical but have different units. Molecular weight is dimensionless (daltons), while molar mass is in g/mol.
Can I use parentheses in formulas?
Currently, this calculator does not support parentheses. Please expand the formula manually before entering it.