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Moles ↔ Particles Calculator

Convert between amount of substance and the number of formula units, molecules, atoms or ions using the exact Avogadro constant.

Calculator

Results update as you type. Every step of the working is shown below.

Examples:

Scientific notation accepted, e.g. 3.01e23.

Result

Enter values above — the answer appears here instantly, with full working.

Formula used

N = n · Nₐ

Every result substitutes your values into this relation step by step above.

Assumptions

  • Uses the exact defined Avogadro constant Nₐ = 6.02214076×10²³ mol⁻¹.
  • "Particles" means whatever the formula unit represents (molecules, formula units, atoms…).

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