Molecular Weight Calculator
Calculate the molecular weight of chemical compounds.
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Molecular Weight Calculator
Enter a chemical formula (e.g., H2O, NaCl, C6H12O6)
Molecular Weight Calculator
Molecular weight (also called molecular mass or molar mass) is the sum of the atomic weights of all atoms in a molecule. It is measured in atomic mass units (amu) or grams per mole (g/mol) and is essential for stoichiometry calculations in chemistry.
Common Uses
- Calculating the molar mass of chemical compounds
- Stoichiometry and reaction calculations
- Preparing solutions of known concentration
- Pharmaceutical and biochemistry research
Frequently Asked Questions
How do I calculate molecular weight?
Sum the atomic masses of all atoms in the molecule. Example: Water (H₂O): 2 × 1.008 (H) + 1 × 15.999 (O) = 18.015 g/mol. Atomic masses are found on the periodic table.
What is the difference between molecular weight and molecular formula weight?
These terms are often used interchangeably. Technically, molecular weight refers to a single molecule (in amu), while molar mass refers to one mole of molecules (in g/mol). Numerically, they are equal.
Is this calculator free to use?
Yes. All calculators on zenicalculator.com are completely free with no registration required.
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