To round up to the next half in Excel, you can use the CEILING function. This function rounds a number up to the nearest integer or multiple of significance.

For example, if you wanted to round 2.5 up to the next half, you would use the following formula:

=CEILING(2.5,0.5)

This would return 3, because 3 is the next highest integer that is a multiple of 0.5.

If you want to round up to the next half for a range of cells, you can use the CEILING function in an array formula.

For example, if your data was in cells A1:A10, and you wanted to round each number up to the next half, you would use the following formula:

=CEILING(A1:A10,0.5)