Enter a chemical formula to instantly calculate its molar mass (molecular weight), with a full per-element breakdown.
Type a chemical formula using standard notation — capital letters for elements (e.g. Na, Cl), numbers for subscripts (e.g. H2O), and parentheses for grouped units (e.g. Ca(OH)2). Click Calculate to see the total molar mass and a breakdown of each element's contribution.
This calculator uses standard atomic weights (rounded to typically 2-3 decimal places) for all 118 known elements, based on published periodic table values.