Why Gemini™ in Google Sheets™ gives wrong answers
Ask Gemini™ in Google Sheets™ for a total and get a confident wrong number, and the model is rarely the problem. It read your sheet the way it is, and sheets built for human eyes are full of things that mislead a reader that takes every cell literally.
What AI trips over
The usual suspects, in rough order of damage:
- Merged cells, especially in headers. A merged title across A1:D1 means three of those cells are empty, so anything reading the header row finds gaps.
- Banner and title rows. A "Q3 Sales Report" row above the real headers pushes the data down, and the reader may treat row 1 as the headers.
- Blank rows and columns inside the data. A reader often stops at the first gap, so rows below it get ignored.
- Numbers stored as text. Values with a leading apostrophe, trailing spaces or currency symbols typed in by hand look like numbers but do not add up.
- Totals rows mixed into the data. A "Total" row at the bottom gets counted as one more data row unless it is clearly separated.
Check by hand
- Unmerge every merged cell (Format → Merge cells → Unmerge) and keep one header row.
- Delete banner rows above the headers, or move the title into the tab name.
- Close blank rows and columns inside the data block.
- Spot-check suspect columns with
=ISNUMBER(A2)copied down. Anything FALSE needs converting to a real number. - Move totals below a blank row, or label the row clearly.
Score the whole sheet at once
AI Readiness Scanner and Fixer™ scores a Google Sheets™ file out of 100 for AI readability and explains every finding, so you can see exactly why an AI misreads it. Scanning, the score, every explanation and Undo are free.
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Google, Google Sheets™, Google Workspace™ and Gemini™ are trademarks of Google LLC. ChatGPT is a trademark of OpenAI; Copilot is a trademark of Microsoft Corporation. AI Readiness Scanner and Fixer is not affiliated with or endorsed by Google, OpenAI or Microsoft.