Molar Mass Calculator

Enter a chemical formula to calculate molar mass (molecular weight) in g/mol.

🧱 Molar Mass Calculator

Chemical Formula

⚠ Invalid formula. Use element symbols with numbers, e.g. H2O, NaCl.

Formula

M = Σ(element × count)

Molar Mass

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g/mol

🧱 How Molar Mass is Calculated

Molar mass is the mass of one mole of a substance (6.022 × 10²³ particles). It equals the sum of atomic masses of all atoms in the formula.

M = Σ (Atomic Mass × Number of Atoms)

Common Atomic Masses (g/mol)

1.008

12.011

15.999

14.007

22.990

35.453

40.078

55.845

📖 Step-by-Step Example

✅ Molar Mass of H₂SO₄

H₂SO₄ = 2H + 1S + 4O

H: 2 × 1.008 = 2.016 g/mol

S: 1 × 32.065 = 32.065 g/mol

O: 4 × 15.999 = 63.996 g/mol

Total = 98.077 g/mol

❓ FAQ

What is molar mass?

Molar mass is the mass of one mole (6.022×10²³ particles) of a substance, measured in g/mol. It numerically equals the atomic or molecular weight.

How do I read a chemical formula?

Each element symbol (e.g. H, Na, Ca) is followed by the number of atoms. H₂O means 2 hydrogen and 1 oxygen atoms. Ca(OH)₂ has 1 Ca, 2 O, and 2 H.

What is the difference between molar mass and molecular mass?

Molecular mass is in atomic mass units (amu) for a single molecule. Molar mass is in g/mol for one mole. Numerically they are equal: H₂O molecular mass = 18.015 amu, molar mass = 18.015 g/mol.

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Comprehensive Guide

The Science Behind Molar Mass

Leverage this Molar Mass Calculator to instantly determine exact values without the hassle of manual formula manipulation. A solid grasp of Molar Mass is critical for safely and effectively handling chemical compounds in practical scenarios. Mastering the concepts behind Molar Mass is crucial for understanding advanced chemical reactions and laboratory procedures.

Why is Molar Mass Important?

In analytical chemistry, precision is everything. Having a reliable way to compute Molar Mass saves time, prevents wasted materials, and ensures scientific accuracy.

⚡

Speed

Instant

🎯

Accuracy

100%

🎓

Level

All Levels

Always verify your input units before calculating. Mismatched units (e.g., using mL instead of L) are the most common source of error when determining Molar Mass!

Common Applications

Academic Study: Checking literature values against experimental yields.
Laboratory Practice: Calculating theoretical thresholds for experiments.
Data Validation: Improving general chemistry proficiency.

Relying solely on the calculator without understanding the underlying formula. Always review the step-by-step breakdown to internalize the mechanics.