LEN formula excludes line feed?

if you dont' mind a VBA UDF you can use this to get the count of char(10) :

Function CountOccurOf(SrchStr As String, StrVal As String, Optional StrtPos, Optional CaseSensitive) As Long
    Dim LCount, Count As Long
    If IsMissing(StrtPos) Then StrtPos = 1
    If IsMissing(CaseSensitive) Then CaseSensitive = True
    CountOccurOf = 0
    If StrtPos > Len(StrVal) Then Exit Function
    If Len(SrchStr) = 0 Or Len(StrVal) = 0 Then Exit Function
    Count = 0
    For LCount = 0 + StrtPos To Len(StrVal)
        If CaseSensitive Then
            If Mid(StrVal, LCount, Len(SrchStr)) = SrchStr Then Count = Count + 1
        Else
            If UCase(Mid(StrVal, LCount, Len(SrchStr))) = UCase(SrchStr) Then Count = Count + 1
        End If
    Next LCount
    CountOccurOf = Count
End Function

To insert into your workbook, open VBA editor (Alt+F11),
Insert -> Module
Copy the Above code, then Paste into the new module,
Save, Then Close Editor;

your Formula would Look like this :
A1: =LEN(A2)+CountOccurOf(CHAR(10),A2)

Hope this helps