Calculating your daily caloric needs isn’t witchcraft, just a little math. There are many different formulas to do your calorie accounting, all have a certain limitation to their accuracy.
Here is a calculator that I find helpful. You may enjoy checking it out. 
Determining Daily Calorie Needs
Knowing your calorie requirements is only one side of your calorie accounting. The other side is being HONEST and KNOWLEDGEABLE about your intake. That may be the hardest part.
Tweeting
September 15, 2011
Its good to see you’re posting again! I was missing it!