Molar Mass Calculator
Calculate the molar mass of a single element's atoms from its symbol and count.
Quick answer: enter your details below and click Calculate Molar Mass — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Pick an element.
- Enter how many atoms.
- Click Calculate Molar Mass.
About this tool
Pick an element from the common list and enter how many atoms. The tool multiplies the element's standard atomic mass by the count. It covers single elements only, not compounds: a compound's molar mass is the sum over all its elements.
Frequently asked questions
Does it do compounds like water?
No. It covers one element at a time; add each element's contribution for a compound.
Are atomic masses exact?
They are standard average values; isotopes shift them slightly.