Convert between grams, moles, and number of particles using Avogadro's number. Essential tool for chemistry calculations with common substances preset.
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The mole is chemistry's counting unit - connecting the mass we can measure to the particles we can't see. This calculator helps you convert between grams, moles, and number of particles using Avogadro's number (6.022 × 10²³).
A mole is 6.022 × 10²³ particles of any substance. The molar mass (g/mol) tells you how many grams equal one mole. From these relationships, you can convert between mass, moles, and particle count.
Key Formulas
Calculate reactant and product amounts in reactions.
Determine mass needed for specific mole amounts.
Find number of atoms or molecules in a sample.
Check mole conversion calculations with steps.
Convert in any direction between mass, moles, and particles.
Quick access to molar masses of common chemicals.
Handles very large numbers like particle counts properly.
Avogadro's number (6.022 × 10²³) is the number of particles in one mole of any substance. It's named after Amedeo Avogadro and is fundamental to connecting macroscopic measurements to atomic-scale quantities.
Add up the atomic masses of all atoms in the formula. For H₂O: 2(1.008) + 16.00 = 18.015 g/mol. Use the periodic table for atomic masses.
No! Particles can be atoms (for elements like Fe), molecules (for covalent compounds like H₂O), formula units (for ionic compounds like NaCl), or ions depending on the substance.
Particles are too small and numerous to count directly. Even a small sample contains trillions of trillions of particles. Moles provide a convenient way to work with these huge numbers using normal-sized quantities.