How to convert jpg to inventor or autocad?

try with adobe ilustrator

u cannnot convert bitmap to vector in easy way.in Inventor draft import a bitmap and then try to draw on it using Inventor toolt, lines splajns etc.

Maybe, the AutoCAD Raster Design can help you.

http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=2600114

regards,