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Calculate basal energy expenditure (BEE) and total energy expenditure adjusted for activity, illness stress, and fever.

How It Works

How BEE Calculator (Basal & Total Energy Expenditure) Works

BEE is calculated with the Harris-Benedict equation from weight, height, and age, using separate constants for men and women — it estimates the calories your body burns at complete rest just to keep basic functions running.

Total energy expenditure then multiplies BEE by three separate factors: an activity level factor, a stress factor for illness or recent surgery (since the body burns more energy recovering from these), and a fever factor, since body temperature above normal raises metabolic rate too.

FAQ

Frequently Asked Questions

Who typically uses this calculator?
It's closer to a clinical nutrition tool than a general fitness calculator — hospitals and dietitians use versions of this to estimate calorie needs for patients recovering from illness, surgery, or injury, where standard fitness TDEE calculators don't account for the extra energy cost of healing.
Why does the stress factor list so many specific conditions?
Different illnesses and injuries raise metabolic demand by different amounts — burns, for instance, dramatically increase energy needs during healing, while a mild infection raises it only slightly, so the calculator uses condition-specific multipliers rather than one general "sick" factor.