Caloric Requirements
Info
Age in years
Weight
unit kg lb
Height
unit in cm
Patient Gender Male Female
Activity Level Sedentary (little or no exercise) Lightly active (Some physical activity 1-3 days/week) Moderately active (Exercise 3-5 days/week) Very active (Exercise 6-7 days/week) Heavy physical training, double training, etc
R e s u l t s
Estimated Caloric Needs - kcal/day
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Caloric Requirements

This calculation is based upon the Basal Metabolic Rate (BMR) of Harris and Benedict, multiplied by an activity factor.

The resulting value estimates total caloric need to maintain weight given the following factors:

  • Gender
  • Height
  • Weight
  • Age
  • Activity Level

BMR in units of Kcal/day:

Males = 66.5 + (13.75 x Wt) + (5.003 x Ht) - (6.775 x age)

Females = 655.1 + (9.563 x Wt) + (1.850 x Ht) - (4.676 x age)

  • Wt = Kilograms of actual body weight
  • Ht = Height in cm
  • Age = Age in years

Expenditures due to activity affect the actual caloric requirements to maintain one's weight, usually by a multiple of the BMR of:

Energy Needs Activity Level
BMR x 1.2 Sedentary (little or no exercise)
BMR x 1.375 Lightly active (Some physical activity 1-3 days/week)
BMR x 1.5 Moderately active (Exercise 3-5 days/week)
BMR x 1.725 Very active (Exercise 6-7 days/week)
BMR x 2.0 Heavy physical training, double training, etc

Reference:

Harris J, Benedict F. A biometric study of basal metabolism in man. Washington D.C. Carnegie Institute of Washington. 1919.