Convert seamlessly between mass and molar amounts for any chemical substance.
Presets
Conversion Data
g
g/mol
Calculated Amount
Moles1.0000mol
Particle Count
6.0221e+23entities
Moles = 18.015 / 18.015
Molar Mass Scale
Comparison of 1 mole weight (g) across substances.
About this calculator
Overview
The mole is the bridge between the microscopic world of atoms and the macroscopic world of the laboratory. Converting grams to moles (or vice-versa) is the fundamental first step in stoichiometry, allowing you to move from 'how much does it weigh?' to 'how many particles are reacting?'
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Pro Tips
n is moles, m is mass (g), and M is molar mass (g/mol).
One mole always contains approx. 6.022 × 10²³ particles.
Molar mass is found by summing atomic masses from the periodic table.
If your mass is in mg, divide the molar mass by 1000 or multiply mass by 0.001.
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Fun Facts
"A mole of water (18g) is just a few sips, but it contains more molecules than there are grains of sand on all the Earth's beaches."
"The concept of grams-to-moles was perfected by Wilhelm Ostwald to make laboratory proportions standardized."
"If you had a mole of pennies and spent a million dollars every second, it would take you 19 billion years to spend it all."
