Look what I found. This is a neat site!
WWW.caloriesperhour.com
An activity with a MET of one corresponds to a person's Basal Metabolic Rate (BMR), the rate at which they would burn calories sitting still. In fact, if you select the activity "Sitting (still)" and calculate the number of calories you would burn in 24 hours the result will equal your BMR.
Other activities are assigned METs to indicate their intensity level relative to BMR. Driving a car has a MET of two and playing water polo has a MET of ten. Thus you would burn twice as many calories driving a car as you would sitting still; and ten times as many playing water polo.
You can see that databases containing lists of activities with their corresponding MET values are designed to be used with BMR, yet most calculators only use weight. They calculate one calorie per kilogram of body weight per hour per MET. Using this method a 200 pound person would burn twice as many calories as a 100 pound person:
90.7 kg (200 lb) x 24 hours x 1 MET = 2,177
45.4 kg (100 lb) x 24 hours x 1 MET = 1,090
When we take sex, age, and height into account and calculate BMR we get more accurate results:
If the 200 pound person were a 25 year old, 6 foot male, his BMR would be 2,062, significantly lower than the figure above.
If the 100 pound person were a 25 year old, 5 foot 2 inch female, her BMR would be 1,266, significantly higher than the figure above.
Our calculator uses your sex, age, height and weight to calculate your BMR; multiplies your BMR by the number of METs assigned to the activity you select; and adjusts the results to reflect the duration of activity to give you the best possible estimate of calories burned