Calorie & TDEE Calculator
Estimate adult basal metabolic rate (BMR) and total daily energy expenditure (TDEE) with the Mifflin-St Jeor equation
Estimate maintenance calories
Enter adult details, calculate the estimate, then review the method and limits
- Enter adult detailsChoose units, formula, and activity
- Calculate the estimateApply the stated resting-energy method
- Read the resultCompare BMR and maintenance calories.
Enter formula details
All values stay in this browser session
The formula uses one of two sex-based constants. This selection does not describe gender identity.
Enter adult details, then calculate an estimate.
Ready to calculate
How the estimate is calculated
The Mifflin-St Jeor equation predicts resting energy expenditure and is commonly presented as a BMR estimate. TDEE multiplies it by the selected conventional activity factor. Pregnancy, breastfeeding, growth, illness, medication, body composition, and unusual activity can make the estimate unsuitable.
Read the source paper or compare the NIH Body Weight Planner.
FAQs
What formula does this calculator use?
It uses the adult Mifflin-St Jeor resting-energy equation and multiplies the estimate by the selected activity factor.
What is the difference between BMR and TDEE?
BMR estimates resting energy needs, while TDEE adds an activity estimate for daily maintenance calories.
Is this result medical or nutrition advice?
No. It is a general adult estimate, and individual needs can differ substantially.
How should I choose an activity level?
Use the description that most closely matches your usual weekly exercise and work activity, knowing that the categories are approximate.
What happens to my health inputs when I leave?
Your age, formula choice, height, weight, activity, and results are available only during the current browser session.