There are 3 methods to use the ROUNDDOWN function in Excel to round up numbers, and we have explained all of them in this post.

Start Excel and open the worksheet containing the number you want to round up. Click inside of the cell where you want to display the calculation. Type "=ROUNDUP ()" into the formula bar. Click ...

How to Round Up to the Nearest 10 in Excel. Rounding up a number always results in a figure that is equal to or larger than the original number.

The key to this solution is that Excel’s MROUND function returns a number rounded to a specified multiple (6 in this example). Note that the MROUND function always rounds up, away from zero.