How to use this calculator
- Choose moles, sample mass, or particle count as the known value.
- Enter the value and the chemical formula.
- Calculate the amount, particle count, atom count, and equivalent mass.
Formula and variables
N = nNₐ
| Symbol | Meaning | Unit |
|---|---|---|
| N | particle count | particles |
| n | amount | mol |
| Nₐ | Avogadro constant | mol⁻¹ |
Worked example
1 mol H2O contains exactly 6.02214076e23 molecules and twice as many hydrogen atoms as oxygen atoms.
Interpretation
A mole connects an amount of substance to a count of representative particles.
Common mistakes
- Specify the formula to calculate total atoms.
- Distinguish molecules, ions, and formula units in interpretation.
Frequently asked questions
What can the Moles Calculator calculate?
It converts moles, mass, and representative particles for the entered chemical formula.
What is a representative particle?
It is one molecule, atom, ion, or formula unit of the specified substance.
Which Avogadro constant does the calculator use?
It uses the exact SI value of 6.02214076e23 per mole.
Can I use scientific notation?
Yes. Enter values such as 6.022e23 or 1.0e-6 in a numeric field.
How should I round the result?
Keep extra digits during the calculation. Round the final result to the precision required by your data.