I'm not sure what you mean about "INT" and "Interest". But regarding the numeric formatting, I assume you are using the Format property of the column in the grid. What this property does is call ToString on the Value of the cell and pass in the format. But the DotNet formats are not the same syntax as formatting in Excel - or at least not always. So what you need to do is handle the InitializeColumn event on the UltraGridExcelExporter. This event will give you the format applied to the grid column and allow you to convert it to an appropriate format in Excel. Very often, you can just set one equal to the other, but that doesn't always work so it's not done automatically.