Molar Mass Calculator

Molar mass is the mass of one mole of a substance, expressed in g/mol.

What this calculator does

H₂O: 2(1.008) + 15.999 = 18.015 g/mol. NaCl: 22.990 + 35.453 = 58.443 g/mol.

Frequently asked questions

How do you calculate molar mass?

Add up the atomic masses of all atoms in the formula. E.g., H₂O = 2(1.008) + 15.999 = 18.015 g/mol.