How does the Avogadro Calculator work?

Particles = Moles × 6.022×10²³ Then: Moles = Mass / Molar mass Then: Molar mass H₂O = 18.015 g/mol Then: 1 mole of any ideal gas at STP = 22.4 litres.

Can you give an example of how to use the Avogadro Calculator?

Example: Input 36g of water (H₂O) gives a result of 36/18.015 = 2 moles; 2 × 6.022×10²³ = 1.204×10²⁴ molecules.

Is the Avogadro Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Avogadro Calculator?

Our Avogadro Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Avogadro Calculator

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.

f(x)Particles = Moles × 6.022×10²³ | Moles = Mass / Molar mass | Volume (STP) = Moles × 22.4 L

1Particles = Moles × 6.022×10²³
2Moles = Mass / Molar mass
3Molar mass H₂O = 18.015 g/mol
41 mole of any ideal gas at STP = 22.4 litres

Example 1

Given:36g of water (H₂O)

Result:36/18.015 = 2 moles; 2 × 6.022×10²³ = 1.204×10²⁴ molecules

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Substance	Formula	g/mol
Water	H₂O	18.015
Carbon dioxide	CO₂	44.010
NaCl	NaCl	58.440
Oxygen gas	O₂	32.000

What is Avogadro Calc?

Avogadro\. Use this calculator for accurate, instant results.

How accurate is the Avogadro Calc calculator?

The calculator uses the standard published formula for avogadro calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Avogadro Calc calculator use?

This calculator works with litres. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Avogadro Calc calculator use?

The core formula is: Particles = Moles × 6.022×10²³. Each step in the calculation is shown so you can verify the result manually.

References

›Avogadro constant — NIST

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Number of atoms or molecules from moles. Full formula with variable legend, worked example and step-by-step chemistry solution.

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