I stand 6 feet 2 inches tall. My standing reach is 8 feet, so I need to jump a mere 24 inches to touch the rim. This I can and have done many times.
But to dunk, you actually need, seemingly, an additional 30/pi inches (about 9.6 inches) of reach to allow the ball to clear the rim. This, I have never been able to do.
I can definitely dunk or tip in an extremely well placed alley oop, but thus far I have never successfully dunked.
