Molar mass is the mass of one mole of a substance (typically in grams per mole, g/mol). It sums the atomic masses of all atoms in the molecule.

Does it support brackets?

Currently, this basic calculator does NOT support brackets (e.g., Ca(OH)2). Please expand the formula manually (e.g., CaO2H2).

Why does case matter?

Chemical symbols use case to distinguish elements. 'Co' is Cobalt, but 'CO' is Carbon + Oxygen. Always capitalized the first letter of an element.

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Molar Mass Calculator

Calculate the molar mass and percentage composition of chemical compounds.

Chemical Formula

Valid Formula

Total Molar Mass

18.0150

g/mol

Standard Atomic Weights

Atomic Composition

Hydrogen

1.008 × 2

2.016

11.2%

Oxygen

15.999 × 1

15.999

88.8%

Quick Guide

Enter the Chemical Formula (e.g., C6H12O6).
Ensure elements are Capitalized (e.g., "Na" for Sodium, NOT "na").
The calculator will instantly determine the total Molar Mass (g/mol).
View the detailed Percentage Composition breakdown below.

Formulas & Logic

Reference Module v1.0

Calculations

Total Molar Mass (M)

M = Σ (Atomic Mass × Count)

Mass Percentage

% = (Mass of Element / Total M) × 100

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Student Guide

Weighing Molecules

How much does a molecule weigh? The Molar Mass Calculator takes any chemical formula (like H2SO4 or C6H12O6) and computes its exact mass based on the latest atomic weights.

Why Use This Tool?

Calculating molar mass manually involves looking up each element, multiplying by the subscript, and summing it all up. It's slow. This tool does it in milliseconds, with zero rounding errors.

Key Benefits

Supports complex formulas with parentheses (e.g., Ca(NO3)2)
Provides breakdown of mass percentage by element
High-precision atomic weights
essential for all Stoichiometry calculations

Educational ContextProfessor's Note

The Mole is the bridge between the atomic world and the human world. It lets us count atoms by weighing them. Molar Mass is the conversion factor that makes this possible.

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