How to check duplicate entries in a spreadsheet

For check duplicate entries in a spreadsheet in Google Sheets, start from the cell or range you care about, then use the menu that matches the job (Format, Data, Insert, or View). Prefer a small test range before changing a whole tab. Search the menus for “check duplicate entries” if you are unsure which command applies. Linked glossary terms and formula pages below go deeper when this is function-related.

Steps

  1. 1

    Select the cells involved.

  2. 2

    Use Format, Data, Insert, or View for the action.

  3. 3

    Confirm on a small sample first.

  4. 4

    Apply to the full range and spot-check results.

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