Molar Mass Calculator
Molar mass calculator
Compute molar mass from sample mass and moles.
InputsChemistry2 fieldsLive
Result
58.44 g/mol
Uses Mr = m / n.
Live update
Chem signal
Advanced options
Formula
Mr = m / n Symbol legend
| Symbol | Meaning | Unit | Copy |
|---|---|---|---|
M_r | Molar mass | g/mol | |
m | Sample mass | g | |
n | Amount of substance | mol |
- Use measured sample mass m.
- Use measured or known moles n.
- Divide m by n to get molar mass.
Example
Worked example: 58.44 g and 1.00 mol
- 1 m = 58.44 g
- 2 n = 1.00 mol
- 3 Mr = m / n = 58.44 / 1.00 = 58.44 g/mol
The molar mass is 58.44 g/mol.
How
- Enter mass in grams.
- Enter moles for the same sample.
- Read molar mass in g/mol.
Avoid
- Using mass and moles that do not represent the same sample.
- Forgetting unit consistency before division.
- Using zero moles, which is mathematically invalid.
Ref only. Verify values. Follow lab safety.
FAQ
Can I calculate molecular weight with this tool?
Yes. In this context molecular weight and molar mass are numerically equivalent in g/mol.
Can moles be less than 1?
Yes, any positive decimal mole value is valid.
Does this identify chemical formula?
No, it only computes molar mass from provided numeric values.
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