Update Spreadsheet Assumptions and Summarize Changes
Instruct ChatGPT to update specific assumptions in a spreadsheet and then list all modifications made.
Update assumptions on the [[tab_name]] tab only. Don't change formatting. Summarize changes.
This prompt is designed for the ChatGPT for Excel add-in.
Assumptions on the 'Inputs' tab have been updated. Changes include: Increased 'Revenue Projection' from $100,000 to $120,000. Adjusted 'Marketing Spend' from $10,000 to $12,000. Updated 'Conversion Rate' from 2.5% to 2.8%.
Use this prompt to tell ChatGPT which assumptions to update in your spreadsheet and to request a summary of all the changes it makes.
Provides clear instructions for targeted updates and ensures transparency by requesting a summary of modifications.
When you need to update multiple, unrelated parts of a spreadsheet or require complex conditional logic.
- ChatGPT for Excel and Google Sheets ↗OpenAI Help Center · OpenAI Help Center · Oct 19, 2026 · quoted as shared
First seen on Subvolts Oct 19, 2026. Updated Oct 19, 2026. Spotted a problem? Tell us.
- ChatGPT for Excel and Google SheetsOpenAI · OpenAI Help Center · Oct 19, 2026
The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.
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Questions people ask
- Which AI tools does this work with?
- The sources used it with ChatGPT, Copilot.
- Where did this come from?
- OpenAI Help Center (OpenAI Help Center). Subvolts collected, normalized and credited it; the link above opens the original.