Formula for caloric expenditure

Formula to determine number of calories needed to support life. Normal resting metabolism is related to body size, amount of muscle tissue, rate of growth, age, sex, thyroid and adrenal activity, and pregnancy and lactation. Resting metabolic expenditure is increased by infection and following trauma. During periods of stress, when insufficient fuel is supplied as food, energy is derived from tissue breakdown. Each of conditions should be considered when computing nutritional needs.

To determing caloric expenditure, calculate basal energy expenditure (BEE) by using the following equations:
Men: BEE = 66 + (13.7 X W) + (5 X H) - (6.8 X A)
Women: BEE = 655 + (9.6 X W) + (1.7 X H) - (4.7 X A)

W is actual (or desired) weight in kg (weight in kg = weight in pounds/2.2)
H is actual height in cm (height in com = height in inches x 2.5)
A is age in years

Activity:
The BEE is increased to adjust for activity level:
Very sedentary: + 20%
Sedentary: + 30%
Moderate: + 40%
Very heavy: + 50%
Fever: an adjustment is made for calories by adding 7% of the BEE to the total for each degree F raised (13% for each degree C).