Calculate Molecular Mass

Molecular Formula Calculator

This tool helps you calculate molar mass of compounds like H2O, CO2, CuSO4·5H2O instantly.

How to calculate molar mass?

1. Write chemical formula
2. Count atoms
3. Multiply by atomic mass
4. Add all values

Example

H2O = (2 × 1) + (1 × 16) = 18 g/mol