Periodic Table & Molecular Weight Calculator
Explore the periodic table (H to Ca) and calculate chemical molecular weights and mass ratios in real time
Explore an interactive periodic table for representative elements (H to Ca) and calculate the total molecular weight (g/mol) and percentage mass ratio of elements for any chemical formula (e.g., H2O, C6H12O6).
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How to use
- Click element tiles on the periodic table to construct your formula.
- Type a chemical formula (case-sensitive) directly into the input box.
- Check the calculated total molecular weight in g/mol.
- Review the element mass percentage breakdown graph below and copy the summary.
FAQ
- Can it calculate molecular weights for elements heavier than Calcium?
- This tool is built primarily for representative elements from Hydrogen (1) to Calcium (20). Heavier elements may not be parsed correctly.