TDEE & BMR Calculator
This estimates how many calories your body uses at rest (BMR) and across a typical day (TDEE), using the Mifflin-St Jeor equation. Use it as a starting point, not a precise prescription.
Source: Mifflin MD, St Jeor ST, Hill LA, et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr 1990;51(2):241-247. (doi:10.1093/ajcn/51.2.241)
This calculator runs entirely in your browser. Enable JavaScript to use the interactive version. Nothing you enter is sent to a server.
FAQs
What is the difference between BMR and TDEE?
BMR, the basal metabolic rate, is the energy your body uses at complete rest to keep basic functions running. TDEE, total daily energy expenditure, is your BMR multiplied by an activity factor, and it estimates the calories you burn across a typical day.
Which equation does this use?
It uses the Mifflin-St Jeor equation, which research has found to be one of the more accurate predictive equations for resting energy expenditure in healthy adults.
How accurate is the result?
It is a well-validated estimate, not an exact measurement. Real needs vary with body composition, genetics, and how active you truly are. Use the number as a starting point, then adjust based on how your weight responds over a few weeks.