We have found 5 software records in our database eligible for .ods to .xls file format conversion.
Most modern spreadsheet programs are able to open spreadsheets in OpenDocument format (.ods) and save the data to classic Excel spreadsheet (.xls, .xlsx), i.e. perform ods to xls conversion.
Data in tables should be intact, there might just be some loss of special formatting and special effects exclusive to the original program that saved the .ods spreadsheet in first place.
ODS
Files with ods file extension can be nowadays commonly found as spreadsheets saved using Calc program from OpenOffice.org, LibreOffice and perhaps other office productivity bundles that use documents based on OpenDocument Format schema.
XLS
Files with xls extension are best known as spreadsheets from Microsoft Excel. A spreadsheet is basically a grid of cells sorted in rows and columns. Each cell can contain text, numeric or formula data. Excel XLS spreadsheets can be opened in most other similar programs, such as OpenOffice.org Calc.