It's hard to say. I used to smoke 100's and with a normal puff on an analog taking a puff every10 or so seconds I would yield 10-15 puffs. In all actuality, based on normal routines, a good 7 puffs and my analog was done. If you were doing something like a video game, you might be lucky to get 3 or 4 and the rest would burn out. With the e-cigs, you never have that waste. I am usually satisfied after 5 good 5 second puffs on my 510 with 24mg. But that's just me. Like I've seen in may posts on here, everyones tolerance is different. 3 24mg hits might equal 1 analog to you or 25 16mg hits. Each user is different. You will have to experiment as to what you can handle and for how long you can do it.
That's my 25 cents (inflation baby).