ASTM E29 - Rounding...
When the digit beyond the one you want to keep is less than 5, do not
change the digit you are keeping. When the digit beyond the one you want to
keep is greater than 5, increase the digit you are keeping by 1. When the
digit beyond the one you want to keep is equal to 5 and there are non-zero
digits beyond it, increase the digit you are keeping by 1. When the digit
beyond the one you want to keep is equal to 5 exactly, and the digit you
are keeping is odd, increase the digit you are keeping by 1. If the digit
you are keeping is even, keep it unchanged.
So, it doesn't... use this formula:
=IF(A2-INT(A2)-0.5=0,EVEN(ROUNDDOWN(A2,0)),ROUND(A2,0))
to round to whole numbers.
If you want decimal places... it gets more complicated.
Good luck!