Calculate the molar mass of chemical compounds from elemental composition.
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Results
Molar Mass
18.02
g/mol
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Formula
Molar Mass = Σ(Atom Count × Atomic Mass)
How to Use This Calculator
How to Use
- 1
Enter the number of each type of atom.
- 2
Calculate the total molar mass.
Frequently Asked Questions
Frequently Asked Questions
What is molar mass?
Molar mass is the mass of one mole of a substance, expressed in g/mol. It equals the sum of atomic masses of all atoms in the molecule.
What's the atomic mass of common elements?
H=1, C=12, N=14, O=16, S=32, Cl=35.5, Na=23, K=39, Ca=40, Fe=56
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About This Calculator
This calculator uses the formula: Molar Mass = Σ(Atom Count × Atomic Mass). All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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