Calculate molecular weight of chemical compounds
Use parentheses for groups, e.g., (NH4)2SO4
Common Formulas:
Formula
Molar Mass
0.00 g/mol
Elements
0
Atoms
0
| Element | Symbol | Count | Atomic Mass | Total Mass | Percentage |
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Our free Molar Mass Calculator helps students, chemists, and researchers quickly calculate molecular weights of chemical compounds. Whether you're preparing laboratory solutions, solving chemistry homework, conducting research, or analyzing chemical reactions, this tool provides accurate molar mass calculations.
Calculate molecular weights, determine stoichiometric ratios, prepare molar solutions, analyze chemical composition, and solve chemistry problems with our precise molar mass calculator using latest atomic weight data.
Uses most recent IUPAC atomic weights with proper significant figures and isotope abundance considerations for maximum accuracy.
Handles hydrates, coordination compounds, organic molecules, and complex ions with parentheses and coefficient multipliers.
Provides detailed percentage composition by element and mass contribution of each atom in the molecule.
Delivers results instantly with real-time parsing and calculation, saving time on manual computations and lookup tables.
Used by chemistry students, teachers, laboratory technicians, and researchers worldwide. No registration required - calculate molar mass instantly!
Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It's calculated by summing the atomic masses of all atoms in a chemical formula, multiplied by their respective subscripts.
Enter element symbols with proper capitalization (Na, not NA), use numbers for subscripts (H2O), and parentheses for groups (Ca(OH)2). Our parser understands standard chemical notation.
Yes, our calculator supports hydrates (CuSO4·5H2O), coordination compounds, organic molecules, and complex ions. Use the dot operator for hydrates and parentheses for complex groups.
We use the latest IUPAC standard atomic weights based on relative atomic mass values from the CIAAW, considering natural isotope abundance for each element.