One problem with formulas like that is that they don't take into account the fact that fat tissue is less metabolically active than lean body mass. If you're more than 20% above your ideal body weight, you should use adjusted body weight to get a better idea of how many calories you burn. (Of course, it's all just an estimation anyway)<br><br>

To figure out ideal weight: (IBW) girls: 100# for the first 5 feet tall, then 5# per inch above that. Guys: 106# for the first 5 feet, then 6# per inch above that.<br><br>

To get adjusted (ABW), subtract IBW from actual wt. Multiply that number by .25, then add the number you get to IBW.<br><br>

So let's say you are a 5'4" tall female, and you weight 160#. IBW is 120#.<br>

160 - 120 = 40<br>

40 x .25 = 10<br>

10 + 120 = 130# is your ABW.<br><br>

That's the standard practice among dietitians, anyway. There are definitely some flaws to the system (what is "ideal" body weight anyway? What if someone has higher than average muscle mass? etc. etc.), but it works for the majority of the population, and calculating calorie needs has always been an estimation at best. In any case, it gives a little more accuracy to the estimation, and it's a good starting point.