Chemistry Molar Mass Calculator
Type a chemical formula and get its molar mass in grams per mole, with a per-element breakdown. Parentheses are supported, for example Ca(OH)2.
| Element | Name | Atoms | Atomic mass (g/mol) | Subtotal (g/mol) |
|---|---|---|---|---|
| Total | ||||
How to use
- Type a chemical formula using element symbols and numbers, for example H2SO4 or C6H12O6.
- Use parentheses for groups, for example Ca(OH)2. A number after a closing parenthesis multiplies the whole group.
- Press Calculate to see the molar mass and the contribution of each element.
Notes
Atomic masses are standard values in grams per mole. Formulas with dots for hydrates (for example CuSO4.5H2O) are not supported yet; enter the expanded formula instead. Results are rounded to three decimals and are intended for study and quick checks.
Frequently Asked Questions (FAQ)
How do I calculate the molar mass of a compound?
Type the chemical formula using element symbols and numbers, for example H2SO4, then press Calculate to see the molar mass in g/mol and the contribution of each element.
Does the calculator support parentheses in formulas?
Yes. Use parentheses for groups, for example Ca(OH)2, and a number after a closing parenthesis multiplies the whole group.
What does the result table show?
It shows the total molar mass in g/mol, the total number of atoms, and a per-element breakdown with atomic mass and subtotal.
Are hydrate formulas with dots supported?
No. Formulas with dots, for example CuSO4.5H2O, are not supported yet. Enter the expanded formula instead.