Type a chemical formula — element symbols are case-sensitive (Co is cobalt, CO is carbon monoxide). Use parentheses for groups and a dot (·) for hydrates, e.g. Ca(OH)2 or CuSO4·5H2O. You'll get the molar mass and the percent each element contributes. Everything runs in your browser.

Chemical formula

The molar mass appears here.

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Molar masses use standard atomic weights (IUPAC). Element symbols are case-sensitive. The dot separator for hydrates can be typed as · or a plain period. Results are for a neutral formula unit; charges and isotopes aren't accounted for. Nothing you type is uploaded.