In Excel Online you can print a worksheet but to scale data to print on one page, you’ll need the Excel desktop application.
You can use the Open in Excel button to open the workbook and choose the print option to fit the sheet on one page.
Tip: When you print a worksheet on one page the text might not always appear in the right size and you might need to try out different font sizes and print options until it’s just right.
Click Open in Excel and read the section on setting print options.
For news about the latest Excel Online updates, visit the Microsoft Excel blog.