Filling in a range in Google Sheets differs greatly from Excel so this link is very helpful


Automatically create a series or list

You can use autofill to create a series of numbers, letters, or dates in Google Sheets.

Use autofill to complete a series

  1. Open a spreadsheet in Google Sheets.
  2. In a column or row, enter text, numbers, or dates in at least two cells next to each other.
  3. Highlight the cells. You’ll see a small blue box in the lower right corner.
  4. Drag the blue box any number of cells down or across.
    • If the cells form a series of dates or numbers, the series will continue across the selected cells.
    • If the cells don’t form a series of dates or numbers, the list of values will repeat across the selected cells.