Like shannon said it's different for every person. I think mine was somewhere between CD13 & CD19 at least thats what the calculators are saying. But My dr told me not to worry about the tests that you can get, they are crazy expensive here, he just said to bed every other day from CD12- 21.
It depends on your cycle. 14 days is assuming you have a 28 day cycle. You ovulate approximately 14 days before your period.
But if you don't have a 28 day cycle, your ovulation day can be anywhere from 10-25 days before you get your period.
I myself usually ovulate around day 21.
The best way to know for sure when you ovulate is to track your BBT.