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How to Build Spreadsheets with Gemini in Google Sheets

Use Ask Gemini in Google Sheets to create tables, formulas, charts, and full workbooks on Google AI Pro, Ultra, or eligible Workspace plans.

September 28, 2026 Yum News

Gemini in Google Sheets can draft a tracker from a sentence, write a formula you can inspect, and chart a range you already filled. Google documents the side panel as Ask Gemini. A separate help article covers Build, the flow that plans a new sheet or an end-to-end edit on an existing file.

This guide follows those official help pages and Google’s September 2026 note that Gemini 3.8 Flash is available to Google AI Pro and Ultra subscribers in Gemini in Google Sheets. You do not pick the model ID in the Sheets UI. You pick the prompt and the range.

What Gemini in Sheets can do

Google Docs Editors Help lists these jobs for the side panel:

Create tables
Create formulas
Generate data analysis and insights
Build charts and graphs
Summarize emails and files from Drive and Gmail

A second help article, Build or edit entire spreadsheets with Gemini in Sheets, adds two larger tasks: create a new sheet from a prompt, and complete end-to-end work on a sheet you already opened.

The feature requires an eligible Google Workspace or Google AI plan. Google says it works best on native Google Sheets files. If you opened an Excel upload, use File > Save as Google Sheets first.

For the model that now powers many Workspace generation jobs, see How to Call Gemini 3.8 Flash in the Gemini API. That post covers Pro and Ultra access in Sheets as well as the public API string.

Laptop with a spreadsheet and charts open during a planning session

Open Ask Gemini on the web

Do this on a computer. Google’s get-started steps are written for the desktop Sheets UI.

Open a spreadsheet in Google Sheets.
In the top right, click Ask Gemini.
In the side panel, pick a suggested prompt or type your own.
Place the cursor in a cell inside the range you want Gemini to use. Help text states Gemini in Sheets can currently reference one range at a time.
Review the draft. Insert it into the grid if you want to keep it. Conversation history is not a backup.

Google warns that you lose side-panel history when you reload the browser, close and reopen the spreadsheet, or go offline. Insert generated output if you need it later.

Optional: open More options in the panel and choose Clear history when the thread is cluttered.

Build a new sheet from a prompt

Use the Build flow when the file is empty or you want Gemini to propose a structure before it writes rows.

Open Google Sheets on your computer.
On the right, use the side panel that opens with Build.
Type a prompt that names the columns you need.
Answer any clarification questions.
Review the plan and the template outline.
Add sources if the job should pull from Drive files. Use Clear if you want no extra sources.

Official example prompts from Google:

“Create a sheet to track my monthly expenses with columns for date, category, amount, and notes.”
“Create a table for a project tracker in Google Sheets with columns for task, assignee, deadline, and status.”
“Create a 10-day itinerary for a first-time visitor covering Tokyo, Kyoto, and Osaka.”

Keep the first prompt bounded. Ask for columns and one sample week, not a five-year forecast with unnamed sources.

Edit an existing sheet end to end

Google’s Build article also covers work on data you already stored. One sample prompt is: “Run a full analysis on the data set to help me make decisions about my business.”

Treat that as a starting sentence, then constrain it.

Select the header row so Gemini can see field names.
Click a cell inside the table you want analyzed.
Ask for one artifact: a summary table, a chart, or a formula column.
Insert the result on a new tab if the original grid is already shared.
Check totals with native Sheets functions such as SUM and COUNTIF. Do not accept a generated total as the only check.

Workspace Updates posts from 2025 still describe formula generation that can return more than one option and explain the steps. If an explanation is missing, ask “How does this formula work?” in the next message.

Ask for charts and formulas you can audit

Charts and formulas are the two outputs you should inspect before you share the file.

Charts. Prompt with the chart type and the columns. Example: “Create a scatter plot of Amount versus Date and color points by Category.” Insert the chart only after the axis labels match the headers in your range.

Formulas. Ask Gemini to write the formula in a helper column, not to overwrite raw values. Then read the explanation. If two options appear, pick the one that uses functions you already trust (SUMIFS, XLOOKUP, QUERY) over a long nested statement you cannot debug.

One range. If the analysis spans two tables, copy the second table onto the same sheet first, or run two prompts. Official help is explicit that the product currently references one range at a time.

Notebook and printed charts beside a laptop used for spreadsheet review

Who can use it and which model you get

Eligibility sits on the plan, not on a hidden Sheets flag.

Google’s Build help page says you need an eligible Workspace or Google AI plan. Workspace Updates posts list Business Standard and Plus, Enterprise Standard and Plus, Google AI Pro for Education, and Google AI Pro and Ultra among the groups that receive Gemini in Sheets.

Google’s 2 September 2026 Flash launch post states that 3.8 Flash is available to Google AI Pro and Ultra subscribers across the Gemini app, AI Mode in Search, and Gemini in Google Sheets. The Sheets panel does not expose gemini-3.8-flash as a picker. If your account is on Pro or Ultra and the rollout reached it, that is the workhorse behind many generation jobs.

Admins still need smart features and personalization enabled for Workspace users. End users open the spark control in the top right of Sheets.

Canvas mini-apps are a different surface. They sit on the same tab as your rows and are documented separately. This article covers Ask Gemini and Build, not canvas cards.

Tips

Insert output you care about. History vanishes on reload.
Put the cursor inside the target range before you send the prompt.
Save Excel files as Google Sheets before you rely on Gemini features.
Ask for an explanation whenever a formula lands without one.
Leave math that must be exact to native functions. Use Gemini for structure, labels, and first-pass analysis.
Mark a bad suggestion with the feedback controls under the generated text when the draft is wrong or unsafe.

Conclusion

Gemini in Sheets is a side-panel partner for tables, formulas, charts, and full workbook drafts. Official help is short: open Ask Gemini, keep one range in focus, insert what you want to keep, and use Build when you need a plan plus a template.

Pro and Ultra accounts can also receive Gemini 3.8 Flash in this product. You still review every chart axis and every generated total. The model writes a draft. The spreadsheet remains the source of record after you click Insert.