Microsoft Excel 2003 is limited to:

    • 65,536 rows
       
    • 256 columns
       
    • 255 worksheets in a workbook
       

    It is not possible to add worksheet rows beyond 65,536


    Microsoft Excel 2007 is limited to:
     


      • 1,048,576 rows
         
      • 16,384 columns
         
      • Worksheets are limited by available memory (default is 3 sheets)