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About the Molecular Weight Calculator
This Molecular Weight Calculator computes the molecular weight and molar mass of chemical compounds and elements. Enter a chemical formula such as H2O or C6H12O6 and receive the total mass expressed in grams per mole. The tool handles simple substances and complex compounds alike.
The calculation follows the standard summation method: each element's atomic weight is multiplied by the number of its atoms in the formula, and the products are added together. The only input you need is a valid chemical formula with correct element symbols. Capitalization matters, since Co means cobalt while CO means carbon monoxide. Use parentheses for repeated groups, such as Ca(OH)2, to keep the atom count accurate.
- Type the complete chemical formula into the input field.
- Press the calculate button to process the formula.
- Read the molecular weight result and enter another formula if needed.