Molar Mass Calculator
Enter a chemical formula to compute its molar mass in g/mol.
Molar mass from any formula
The molar mass of a compound is the sum of the atomic weights of its atoms, and it is the bridge between grams and moles in every stoichiometry problem. Enter a formula and this computes it, parentheses and all.
Glucose, C6H12O6, works out to about 180.16 g/mol; calcium hydroxide, Ca(OH)2, to about 74.09. The tool breaks down the contribution of each element so you can check the arithmetic.
Accurate and private
It uses standard atomic weights and a proper formula parser that handles nested groups, computing everything in your browser.
Frequently Asked Questions
How does it parse formulas?
It reads element symbols and their counts, including groups in parentheses with a multiplier, such as Ca(OH)2, and sums the standard atomic weights.
Which atomic weights are used?
The standard atomic weights from the periodic table, covering all elements from hydrogen to oganesson.
What if an element is unknown?
If a symbol is not a valid element, the tool flags it so you can correct the formula.
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