What is the relationship between Excel column width and pixels?

what is the conversion relationship between 6.88 and 60? Or, if I want to set a column 100 pixels, Range.ColumnWidth =? ? I hope you will not hesitate to give us your advice, thank you!

Jan.21,2022

Excel.Application app= new Excel.Application ();
Excel.Workbooks wbs=app.Workbooks;
Excel.Workbook wb=wbs.add ("D:\ 1.xls")
Excel.Worksheet ws=wb.Wroksheets ["sheet1"]

/ / set the width of column A
ws.Columns ["avanza A", System.Type.Missing] .ColumnWidth = 20
/ / set the width of columns A to B
ws.Columns ["avanza B", System.Type.Missing] .ColumnWidth = 20

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