Open the Excel file that has the chart you want to convert. Click on the chart to display the Chart Tools tab, and then click the "Design" tab.

If you wish to create a a Pivot Table and Pivot Chart in Excel, then this detailed article will guide you through the entire process.

Before you convert your Excel data into a table, make sure you have column headers along the top row. This will make dealing with and using the data much more straightforward down the line.