SHEET

SHEET([value])

Returns the sheet number of the referenced sheet.

value

(Optional) The name of a sheet or formula reference.

REMARKS

* This function was added in Excel 2013.
* If "value" is not provided, then the number of the active sheet is returned.
* This function includes all worksheets (visible, hidden, very hidden, chart, dialog sheets, macro sheets).
* This function cannot be called from VBA.
* If "value" is not valid, then #REF is returned.
* For the Microsoft documentation refer to support.microsoft.com

	A
1	=SHEET() = 3
2	=SHEET("Sheet1") = 1
3	=SHEET("Sheet3") = 3
4	=SHEET("Sheet5") = 5

1 - The sheet number of the active worksheet.