Select the cell and highlight the specific character or characters you want to superscript
Press Ctrl+1 to open Format Cells
Go to the Font tab
Check Superscript
Click OK
For a formula result, use a text string with Unicode superscript characters if available
On Windows, insert superscript characters using the Character Map or Alt codes where supported
On Mac, use the Character Viewer to insert superscript characters
Use the Ribbon only if a custom toolbar or add-in provides a superscript command