I've figured out my daily calories a few times out of curiosity (I used to be neurotic about it when on other diets) while I've been on Atkins, and if you follow Induction rules (as I'm doing), it's VERY hard to bump calories up anywhere over 1600 for a day. On average, I'm hitting between 1200-1400 a day with an occasional 1600 day here and there...which is really low for how full I feel all the time
I wouldn't worry about counting calories too much. Unless you're eating sticks of butter and pounds of bacon all day, your calories probably aren't high at all.