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Avogadro Calculator

Number of atoms or molecules from moles

Avogadro's Number Calculator

Moles (mol)
Molar Mass (g/mol)
Avogadro's number: 6.022 × 10²³ particles/mol

Avogadro's number (6.022 × 10²³ mol⁻¹) is the number of particles in one mole of any substance, connecting the macroscopic gram scale with the atomic scale.

  1. 1Particles = Moles × 6.022×10²³
  2. 2Moles = Mass / Molar mass
  3. 3Molar mass H₂O = 18.015 g/mol
  4. 41 mole of any ideal gas at STP = 22.4 litres
36g of water (H₂O)=36/18.015 = 2 moles; 2 × 6.022×10²³ = 1.204×10²⁴ molecules
SubstanceFormulag/mol
WaterH₂O18.015
Carbon dioxideCO₂44.010
NaClNaCl58.440
Oxygen gasO₂32.000
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