Can't be done with formatting as E will always display 1 digit.
This ain't foirmatting either, but maybe it's okay
'-----------------------------------------------------------------
Private Sub Worksheet_Change(ByVal Target As Range)
'-----------------------------------------------------------------
Const WS_RANGE As String = "A1"
On Error GoTo ws_exit:
Application.EnableEvents = False
If Not Intersect(Target, Me.Range(WS_RANGE)) Is Nothing Then
With Target
.Value = Format(.Value / 100000, "0.00") & "E5"
.NumberFormat = "@"
End With
End If
ws_exit:
Application.EnableEvents = True
End Sub
'This is worksheet event code, which means that it needs to be
'placed in the appropriate worksheet code module, not a standard
'code module. To do this, right-click on the sheet tab, select
'the View Code option from the menu, and paste the code in.
--
HTH
Bob Phillips
(remove nothere from email address if mailing direct)