Moles ↔ Molecules Calculator

Moles ↔ Molecules Conversion

Key Concept

• One mole of any substance contains 6.022 × 10²³ particles (Avogadro’s number, N_A).

Formulas

Moles to Molecules:

Number of Molecules = Number of Moles × N_A

Molecules to Moles:

Number of Moles = Number of Molecules / N_A

Where:

• N_A = 6.022 × 10²³ molecules/mol

Examples

• 2 moles of H₂O: 2 mol × (6.022 × 10²³ molecules/mol) = 1.2044 × 10²⁴ molecules.
• 3.011 × 10²³ molecules of CO₂: (3.011 × 10²³ molecules) / (6.022 × 10²³ molecules/mol) = 0.5 mol.