Sorry for so many posts tonight.... I found this link:
1 teaspoon = 120 drops of water = 5 ml
1 teaspoon = 60 drops of thick fluid = 5 ml
I tried the 120 drop with an eye dropper and it was correct.
I'll have to work on a conversion to a very small amount such as 2ml/L down to Xml/60ml or something like that so I can whip up a very small amount of foliar or root feed for just six little seedlings. I suspect it would come out to something like 1 drop or less, but I'm not sure off hand.