Free AI Tool
Formal Charge Calculator
Compute the formal charge on every atom in a molecule or ion, laid out as a table with the arithmetic shown. The charges are summed and matched against the overall charge, which is the fastest way to catch a miscounted lone pair.
How to use Formal Charge Calculator
1. Pick your options
Choose a style, upload an image if the tool asks for one, or type what you want.
2. Hit Generate
The AI does the work in seconds — no sign-up needed to start.
3. Download or copy
Save your result, copy it, or tweak the options and run it again.
Free to use · No sign-up needed to start · Works in your browser
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