Molecular Weight Calculator
Calculate molar mass, elemental composition and atom counts from any valid chemical formula.
Hit Calculate to see the composition breakdown
Element rows appear after calculation
| # | Atom | Count | Molar Mass | Mass % |
|---|
Metrics appear after calculation
Your explanation appears here
Real samples can vary slightly due to isotope abundance, purity, hydration state and rounding.
Your plan appears after calculation
Change the mole amount to convert the same formula into a sample mass.
Calculate a formula first
It parses the chemical formula, expands parentheses and hydrate dots, counts each element and multiplies each count by the element's standard atomic weight. The sum is the molar mass in g/mol.
Yes. Formulas such as Ca(OH)2, Fe2(SO4)3 and CuSO4·5H2O are supported. Use normal element capitalization, such as NaCl rather than nacl.
This tool uses standard average atomic weights and rounding. Actual lab values can differ because of isotope composition, purity, water of hydration, formulation grade or measurement uncertainty.
Results are estimates generated locally in your browser from standard atomic weights and formula parsing. They are for informational and educational purposes only, not a substitute for laboratory validation, safety data sheets, regulatory compliance or professional chemical handling guidance. VisionVix accepts no liability for decisions based on this output.
