Most online logbooks (eQSL, Club Log, QRZ.com) and contest sponsors accept CSV (Comma Separated Values) imports. An Excel sheet saves directly to CSV. You can also export to ADIF using free conversion tools or simple scripts.
Digital logging is a significant upgrade over traditional paper logs. An Excel-based system provides a central location for all your contact data, making it easy to search for specific callsigns or analyze your performance across different bands and modes. ham radio log sheet excel template
[Link]