Select the cell and highlight the character(s) you want to make superscript
Press Ctrl+1 to open the Format Cells dialog
Go to the Font tab
Check Superscript
Click OK
For a single character in a cell, edit the cell and select only that character before applying superscript
If Superscript is unavailable, use the equation editor or insert the superscript character from Unicode
Use the CHAR or UNICHAR function for common superscript symbols when needed
Copy and paste superscript text from another source if formatting is not supported directly
Use Alt codes or the Symbol dialog to insert superscript characters
Apply superscript in charts, text boxes, or shapes by editing the text and formatting the selected characters