Molar Mass Calculator

Enter a chemical formula to calculate its molar mass and elemental composition.

Supports parentheses: Ca(OH)2 and hydrates: CuSO4.5H2O

Common Examples:

Enter a formula to see results

How to Calculate Molar Mass

Molar mass is the mass of one mole of a substance, usually expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a chemical formula.

Steps to Calculate Manually

  1. Identify the formula: For example, Water is H₂O.
  2. Find atomic masses: Hydrogen (H) is ~1.008, Oxygen (O) is ~15.999.
  3. Multiply by atom count: (2 × 1.008) + (1 × 15.999).
  4. Sum the totals: 2.016 + 15.999 = 18.015 g/mol.

This calculator automates this process, handling complex formulas involving parentheses and hydrates instantly.