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Moles to Particles (Atoms/Molecules) Converter
↔ Convert particles to mol instead

Common Conversions

mol particles
0.0001 60220000000000000000
0.001 602200000000000000000
0.01 6.022e+21
0.1 6.022e+22
0.5 3.011e+23
1 6.022e+23
2 1.204e+24
5 3.011e+24
10 6.022e+24
100 6.022e+25

Why this conversion matters in chemistry

The mole and particle conversion is the bench-side statement of Avogadro's number. A 1 mol sample of water (18.015 g) holds 6.022 × 10²³ molecules. Even split into picoliter droplets, each droplet still contains trillions of molecules — the macroscopic and atomic gap is enormous. Avogadro's constant was fixed exactly at 6.02214076 × 10²³ /mol by the 2019 SI redefinition, so the conversion is now a mathematical identity rather than an experimental constant. The factor itself is the bridge between weighable amounts and per-molecule counts.

Formula

particles = mol × 6.02214076 × 10²³

Worked Examples

1 mol = 6.022 × 10²³ particles

Avogadro's number — the count in exactly 12 g of carbon-12.

0.5 mol = 3.011 × 10²³ particles

Half a mole — half of Avogadro's number of particles.

0.001 mol = 6.022 × 10²⁰ particles

1 mmol — still a vast count, about 6 × 10²⁰ particles.

2 mol = 1.204 × 10²⁴ particles

2 mol of diatomic gas like O₂ — this many O₂ molecules, twice as many O atoms.

Frequently Asked Questions

How do I convert moles to particles?
Multiply by Avogadro's number, 6.022 × 10²³. So 0.5 mol becomes 3.011 × 10²³ particles. The factor is exact through the 2019 SI redefinition.
What exactly is Avogadro's number?
Avogadro's number is 6.02214076 × 10²³ /mol — the count of entities (atoms, molecules, ions, formula units) in one mole. Since 2019, it's defined as an exact integer; the mole is whatever amount produces that count.
Do particles mean atoms or molecules?
Depends on the substance. For elemental iron, 1 mol = 6.022 × 10²³ atoms. For water, 1 mol = 6.022 × 10²³ molecules. For NaCl, 1 mol = 6.022 × 10²³ formula units. Always specify the entity being counted.
Why does the mole concept matter?
The mole bridges individual atoms (too small to count) and lab-scale quantities (grams, liters). The conversion lets balanced reaction equations predict actual product yields from measured starting amounts — the routine tool of stoichiometry.