Enter a chemical formula and get the molar mass in g/mol with a full element-by-element breakdown.
| Element | Symbol | Count | Atomic Mass | Contribution |
|---|---|---|---|---|
| Total Molar Mass | ||||
Write the count right after the element symbol: H2O = 2 hydrogen + 1 oxygen
Use parentheses for groups: Ca(OH)2 = Ca + 2×(O+H)
Co = Cobalt (one element). CO = Carbon + Oxygen (two elements)
Enter the formula without spaces, dots, or Unicode subscripts. Use plain numbers: C6H12O6
Molar mass is the mass of one mole (6.022 × 10²³ particles) of a substance, expressed in grams per mole (g/mol). It equals the sum of the atomic masses of all atoms in the formula.
Atomic masses used are standard atomic weights from the IUPAC 2021 table, expressed in unified atomic mass units (u), which are numerically equal to g/mol when calculating molar mass.
Molecular mass is the mass of a single molecule in atomic mass units (u or Da). Molar mass is the mass of one mole of molecules in g/mol. They are numerically equal but have different units.
Molar mass is used to convert between grams and moles: moles = mass (g) ÷ molar mass (g/mol). It's essential for stoichiometry calculations in chemistry.