Excel – Flash fill and the fill handle

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Using the Fill Handle in Excel

The Fill Handle, the small green square at the bottom-right corner of a selected cell, can save you time in various ways:

  • Copying data
  • Extending sequences
  • Applying formulas across multiple cells
  • Repeating a pattern of formatting

1. Extending Sequences #

  • Numeric sequences (e.g., 1, 2, 3): Select the cells containing the start of the sequence, then left-click and drag the Fill Handle to continue the pattern.
  • Days of the week or months: Excel recognizes these patterns too. Select “Mon, Tue, Wed,” then left-click and drag to extend through the week.

2. Growth Sequences #

For exponential patterns like 1, 2, 4, 8, 16:

  1. Right-click and drag the Fill Handle.
  2. Release and select Growth Trend from the menu to continue the pattern.

3. Copying a Sequence or Cell #

To duplicate existing entries exactly:

  1. Right-click and drag the Fill Handle.
  2. Release, then choose Copy Cells.

4. Applying Formulas Across Multiple Cells #

You can use the Fill Handle to copy formulas with relative cell references:

  • Enter a formula (e.g., =SUM(A2:A18)).
  • Drag the Fill Handle across—to the right, for example—to automatically adjust references for each column (=SUM(B2:B18), =SUM(C2:C18), etc.).
  • To keep references fixed (so they don’t adjust when dragging), use absolute references like $A$20. This prevents the reference from shifting
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Updated on January 8, 2026