Molecular Weight Calculator
Calculate molar mass from chemical formulas with element breakdown and percent composition
Enter Formula
Supports subscripts, parentheses, and hydrates (e.g., CuSO4*5H2O)
Results
Element Breakdown
How to Use
- Enter chemical formulas like H2O, NaCl, C6H12O6
- Use parentheses for groups: Ca(OH)2, Al2(SO4)3
- For hydrates, use * or . : CuSO4*5H2O
- Element symbols are case-sensitive (Na, not NA)
About Molecular Weight
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). One mole of any substance contains exactly 6.022 x 10^23 particles (Avogadro's number).
About the Molecular Weight Calculator
Our Molecular Weight Calculator is a powerful tool for chemistry students, researchers, and professionals who need to quickly calculate the molar mass of chemical compounds. Simply enter any chemical formula and get instant results including the total molecular weight, element-by-element breakdown, and percent composition.
Key features: Real-time calculation as you type, support for complex formulas with parentheses and nested groups, hydrate notation support (like CuSO4*5H2O), comprehensive periodic table data with IUPAC atomic weights, percent composition analysis, and quick-select common compounds for easy reference.
Common uses: Stoichiometry calculations, preparing solutions of specific molarity, determining empirical and molecular formulas, analyzing compound composition, and educational purposes in chemistry courses.