Number of Moles Calculator
Calculate the number of moles from mass and molar mass.
g
g/mol
Result
2 mol
Number of moles: 2 mol
Result in all units
Step-by-step solution
moles = mass ÷ molar mass
What Is a Mole?
The mole is the fundamental chemistry unit that expresses the number of particles in a substance. It bridges the mass of a substance and its molar mass.
How is it calculated?
How Is It Calculated?
moles = mass ÷ molar mass
- Enter the mass of the substance (g) and its molar mass (g/mol).
For example, 36 g of water (M=18): 36 ÷ 18 = 2 moles.
Frequently Asked Questions
How many particles are in a mole?
One mole contains as many particles as Avogadro's number (approximately 6.022×10²³).