it depends on how much water you use with it
if you have a 10iu vial and put in 10ccs of water it would be 1iu/ml
if you have a 10iu vial and put in 1cc of water it would be 1iu/ 0.1ml
i THINK 10iu on a u100 slin pin is 0.1cc
so.... if you filled up to the 10 on the slin you'd be doing 1iu
the math is gonna depend on how much water you use and how much growth is in the vial to start with
can i get a math guy to check me on this?? thx