Atom Calculator




Usa 1 per un elemento; per una molecola inserisci il numero totale di atomi per molecola (es. NaCl → 2).

The Atoms, Moles, and Mass Calculator by UtileApp lets you instantly find how many moles, particles, or atoms are contained in a given amount of substance — or perform the reverse calculation.
It’s a powerful and intuitive tool for exploring the relationships between mass, moles, and atomic count, all based on Avogadro’s constant (6.022 × 10²³).

Main features

🔹 Mass → Moles → Particles → Atoms conversion chain
🔹 Reverse calculation: Atoms → Moles → Mass (g)
🔹 Direct conversion: Moles → Mass → Atoms
🔹 Optional field for atoms per molecule (e.g. 3 for H₂O, 1 for Ar)
🔹 Automatic use of molar mass for precise results

Perfect for

  • Chemistry and physics students
  • Teachers and laboratories solving stoichiometric problems
  • Science enthusiasts exploring molecular quantities

Example

🧪 18 g of water (H₂O) with molar mass 18.015 g/mol →
1 mole = 6.022 × 10²³ molecules → 1.806 × 10²⁴ atoms total (3 atoms per molecule).

A fast, clear, and accurate calculator that helps you understand and apply the link between mass, moles, and atomic or molecular quantities — ideal for education and lab work.do intuitivo e immediato.