There was yet another article today about how more Americans are not just overweight, but obese. And then, I found an interactive metabolic rate calculator that I thought you might enjoy:
You enter your gender, height, weight and frequency of exercise to determine (I think roughly) the average number of calories you burn daily. This type of information is useful in determining the number of calories you need on intake in order to maintain or lose weight.
It doesn't state whether or not your BMR (Base Metabolic Rate, calories burned just sleeping or breathing, for example) is taken into consideration per the factors you submit; but I think it might be.
Related link:
What Are Your Caloried Needs?, The Diet Channel