I found Swivel’s free plugin for Excel very nice for converting spreadsheets to a format which can be easily imported to DHIS 2:
Let’s say you have a structure like this:
Orgunit | Period | Country | DataElement1 | DataElement2 | DataElement3| DataElement4| etc.
The Swivel toolbar lets you easily implicitly define the first three columns and the top row as metadata, and transposes the rest into rows with one datavalue per row.
http://www.swivel.com/pantry/excel_swivelbar
Knut