How to calculate exact calories YOU need to cut to lose weight and increase metabolism?

I am so excited to find out how many calories I am 

actually suppose to have to work with.

Once again I have been playing around online trying to come up with more ideas on metabolism - how it works, (and doesn't work) and how to increase.

All of us have heard of BMI (body mass index) I am not even going to go there on what mine would be at this point.

But I just ran across a site that shows how to figure out your BMR.  Basal Metabolic Rate (the number of calories you'd burn if you stayed in bed all day)  Which I could do the "in bed all day" thing but not 

quite possible. lol!  

Such simple steps.  

1.  Go to:  http://www.bmi-calculator.net/bmr-calculator/

    when you enter the correct amt into the "calculator"  click on  

   "Calculate BMR"

2.  The page will refresh and give your amt on a green line just 

     above the calculator boxes

3.  After you know your # for BMR, click on the link just under 

    the calculator that says, "Daily Caloric Needs".  

    This takes you to a new page that has a formula to figure 

    your BMR x Activity level

4.  After you have that number figured, click on the appropriate line 

    that states:  calorie intake to lose weight.

    This will take you to a new page that will explain how to adjust your 
    calorie intake and then exercise is a plus to making this factor work 
    even better.         

**p.s.  

* I had NO idea how many calories I should really be consuming to lose weight at a safe rate, as eating too little is just as tough since your metabolism slows.  I am amazed and excited to have a formula to 

see just what it should be.  

Also, I am trying so hard to make sure I have something to eat every 

3-4 hrs.  Even if it's a little something, just to keep my stubborn lil' 

'Metabo' guy awake and clicking along.