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.
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."
