Add Percent of Total to Excel Files Online
Add a percentage-of-total column to Excel files directly in your browser. Show each row's share of the grand total, or the share within each group — no upload required.
Drop your .xlsx file here
or click to browse — max 50 MB
Frequently Asked Questions
Is my data private?
Yes — completely. Your file is never uploaded to any server. Everything runs locally in your browser using WebAssembly — processing happens entirely inside your tab. Once you close the tab, nothing is retained.
What is the maximum file size?
The free limit is 50 MB. For larger files, performance depends on your device's available memory — most modern machines handle 500 MB to 1 GB comfortably.
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