This is what I go by I hope it helps you!
Take your goal weight and multiply it by
10 if you don't exercise at all
By
13 if you rarely exercise (only play the occasional weekend golf or tennis game)
By
15 if you regularly exercise (swim,walk or jog for 30-60 minutes most days of the week)
So if your goal was 135lbs and you don't exercise that's 1350 calories a day. I took this from prevention magazine(one of my favorites for health and weight less)
Best wishes