Microsoft Excel Limits Maximum Rows Maximum Columns

A Microsoft Office Excel 2003 worksheet contains a maximum of 65,536 rows and 256 columns. You cannot increase the number of rows or columns beyond the maximum row and column limits.

Source: office.microsoft.com

A Microsoft Office Excel 2010 worksheet contains a maximum of 1,048,576 rows and 16,384 columns.

Source: office.microsoft.com