Calculadora de Número de Avogadro
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
N = n·Nₐ = n × 6,022×10²³
About this calculator
The Avogadro's Number Calculator converts between amount of substance in moles and number of particles (atoms, molecules, ions, etc.). The relationship is given by Avogadro's constant, which is 6.022 × 10²³ particles per mole. The user inputs a value in moles or particles, and the calculator automatically performs the conversion using the formula N = n × Nₐ (moles to particles) or n = N / Nₐ (particles to moles).
This tool is essential in chemistry and physics, especially in stoichiometric calculations where it is common to relate the mass of a substance to the number of elementary entities. For example, determining how many molecules are in 2 moles of water, or how many moles correspond to 1.2044 × 10²⁴ carbon atoms. The calculator avoids manual errors and speeds up the conversion process.
Cautions: ensure you use the correct unit for the input value (moles or particles). Remember that Avogadro's constant is an exact defined number, but rounding may be necessary depending on desired precision. For calculations with scientific notation, use the appropriate format (e.g., 6.022e23). The calculator assumes a fixed Avogadro's number without variations.
Frequently asked questions
What is Avogadro's number?
It is a constant representing the number of particles (atoms, molecules, etc.) in one mole of any substance. Its value is 6.022 × 10²³.
How do I convert moles to particles?
Multiply the number of moles by Avogadro's number (6.022 × 10²³). For example, 2 moles contain 1.2044 × 10²⁴ particles.
How do I convert particles to moles?
Divide the number of particles by Avogadro's number. For example, 1.2044 × 10²⁴ particles correspond to 2 moles.
Can I use this calculator for any type of particle?
Yes, Avogadro's constant applies to atoms, molecules, ions, electrons, or any elementary entity.
What is the difference between Avogadro's number and Avogadro's constant?
Avogadro's number is dimensionless (6.022 × 10²³), while Avogadro's constant has units of mol⁻¹ (6.022 × 10²³ mol⁻¹). In practice, they are used interchangeably.