It depends on about a million different factors. lol. When I do nutrition plans for people I ask question after question before determining the best calorie intake. The height and age thing may give you a good number of cals to eat, but it could be a few hundred off as well. Other factors can include your body type, metabolism, activity level, health background, diet background, what you are currently eating and how your body is currently maintaining and feeling, and the list goes on.
Do you know what you are eating now for calories? That's a good place to start. If you find out what you're currently eating and you feel like you're eating enough (not tired, enough energy for your workouts, not feeling hungry all the time) you may want to decrease by a bit and see how your body reacts.
Let me know if I can help more! Good luck.
Sarah