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Adult Calorie Requirement Calculator


Calorie requirement calculator determines how many calories you should eat each day to manage your weight.


Caloric Requirement Calculator
Select sex:
Enter weight: kg
Enter height: cm
Enter age: years
Select activity factor:
Select stress factor:



Based on the Harris-Benedict equations:

Basal energy expenditure (BEE):

For males:

BEE = 66.67 + [13.75 x Weight (kg)] + [ 5 x Height (cm)] - [6.76 x Age (years)]

For females:

BEE = 655.1 + [9.56 x Weight (kg)] + [1.86 x Height (cm)] - [4.68 x Age (years)]

The total daily energy expenditure (TDE) is calculated taken into accounts of activity and stress factors:

TDE = BEE x activity factors x stress factors

Activity factors:

Confined to bed: 1.2

Ambulatory: 1.3

Stress factors:

Surgery: 1.2

Infection: 1.5 (from 1.4 to 1.6)

Trauma: 1.4 (from 1.3 to 1.5)

Burns: 1.8 (from 1.5 to 2.1)

The energy requirements for infants, children, and teenagers are different than those for adults and vary according to age, growth rate, and clinical or metabolic status. They are about 100 kcal/kg/day for infants, 80 to 100 kcal/kg/day for children, and 35 to 60 kcal/kg/day for teenagers.


Copyright © 2007-2016 Drug Information, LLC.

Legal Notices and Disclaimer

All calculator information provided by the is for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease and IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER.

Rev 06/16