Enter any two of the three fields — Mass, Molar Mass, and Moles — into the Mass to Moles Calculator to solve for the missing value, plus get the Number of Molecules automatically calculated on the side.
Calculated Mass
--
Calculated Moles
--
Calculated Molar Mass
--
Number of Molecules
--
A mole is a unit of measurement in chemistry that represents 6.022 × 10²³ particles (atoms, molecules, or ions) of a substance. It's used to connect the microscopic world of atoms to the macroscopic world of grams and provides a way for chemists to count particles by weighing them.
To calculate moles, divide the mass of the substance by its molar mass using the formula: moles = mass (g) / molar mass (g/mol). For example, 10 grams of water with a molar mass of 18.015 g/mol equals 0.555 moles.
Molar mass is the mass of one mole of a substance, expressed in g/mol. To find it, add up the atomic weights of all atoms in the molecular formula. For example, water (H₂O) has a molar mass of 18.015 g/mol (2 × 1.008 + 15.999).
To convert grams to moles, divide the mass in grams by the molar mass of the substance. The formula is: moles = mass (g) ÷ molar mass (g/mol). You need to know the chemical formula to determine the molar mass first.
The number of grams in a mole depends on the substance and equals its molar mass. For example, one mole of carbon-12 is exactly 12 grams, one mole of water is 18.015 grams, and one mole of sodium chloride is 58.44 grams.
One mole contains exactly 6.022 × 10²³ particles (Avogadro's number). This could be atoms, molecules, ions, or any other specified particle type. This number is constant regardless of the type of substance.
Yes, this calculator can determine the third value when you provide any two of the three variables: mass, molar mass, or moles. Simply enter the known values and the calculator will compute the missing one using the fundamental relationship between these quantities.