Molar Mass Calculator
Calculate molar mass from mass and moles using M = m/n. Includes a reference table of common molar masses.
MOLAR MASS
18.015 g/mol
ATOMS PER MOLE
6.022 ร 10ยฒยณ
FORMULA
M = m / n
Common Molar Masses
| Element / Compound | g/mol |
|---|---|
| Hydrogen (H) | 1.008 |
| Carbon (C) | 12.011 |
| Nitrogen (N) | 14.007 |
| Oxygen (O) | 15.999 |
| Water (HโO) | 18.015 |
| NaCl | 58.443 |
| Glucose (CโHโโOโ) | 180.156 |
๐ก How to Calculate Molar Mass
What Is Molar Mass?
Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). It numerically equals the formula weight of the substance in atomic mass units (amu). The molar mass of each element is listed on the periodic table under the element symbol.
How to Calculate Molar Mass
From Mass and Moles
Where M = molar mass (g/mol), m = mass (g), n = number of moles. This is useful when you have experimental data and need to determine the molar mass of an unknown substance.
From a Chemical Formula
Add the atomic masses of every atom in the formula. For HโO: 2 ร 1.008 + 15.999 = 18.015 g/mol. For NaCl: 22.99 + 35.45 = 58.44 g/mol. Molar mass is essential for converting grams to moles, calculating molarity, and finding theoretical yield.