About this tool
Estimate your basal metabolic rate (BMR) and total daily energy expenditure (TDEE) from your sex, age, height and weight using the Mifflin-St Jeor equation, with an activity multiplier. Everything is calculated live in your browser.
Frequently asked questions
What is the difference between BMR and TDEE?
BMR is the energy your body burns at complete rest; TDEE is your BMR multiplied by an activity factor to estimate the calories you burn over a whole day.
How accurate is the estimate?
The Mifflin-St Jeor equation is one of the most reliable predictive formulas, but it is still an estimate — individual needs vary with body composition, genetics and exact activity level.