Formula
Roza and Shizgal republished the Harris–Benedict equations in 1984. The male resting form is:
kcal = (88.362 + 13.397×kg + 4.799×cm − 5.677×age) × activity
The female resting form is 447.593 + 9.247×kg + 3.098×cm − 4.330×age. Activity uses the same planning multipliers as the TDEE page, but the resting equation is different, so the result is not the Mifflin–St Jeor figure.
Assumptions
- The equation is an adult estimate.
- Activity is a planning multiplier, not a measured expenditure.
Worked example
The male equation at age 30, 80 kg, 180 cm, and moderate activity estimates 2,873 kcal.
Input definitions
- Activity
- A multiplier from 1.2 for sedentary days to 1.9 for very hard days.
- Age
- Age in whole years, from 18 to 100.
Limitations
This is an informational estimate for adults. It is not a diagnosis, a diet plan, or a training prescription. Pregnancy, illness, and medication can change what is appropriate.
Questions
Why does this differ from the TDEE page?
TDEE uses Mifflin–St Jeor. This page uses the 1984 revised Harris–Benedict equation, then the same style of activity multiplier.
Is the result a diet?
No. It is a maintenance estimate from a published equation.