Yeah, will tonight be soon enough for me to fish out the equations and send them to you? I assume you want to take altitude, barometric pressure and temperature and compute density altitude first, to get TAS rather than IAS. Will a QuattroPro spreadsheet be OK? Jim Andrew Kunz wrote: > I need to convert kPa to MPH or km/h for a quickie project. > > Anybody have the info I need? > > Andy