D7000 Shots Remaining
It can only give you an estimate for one card. File sizes vary; in 14-bit compressed RAW I average about 17MB per shot, but can be anywhere from 14 to 20 at times.
One thing to note is if you are using two cards and have the overflow option enabled (so the 2nd card will be used once the 1st fills up), you will ONLY see shots remaining for one card.
I have the same Q ... over a year later it seems too conservative and I would sat misleading