TDEE Calculator
Total daily energy expenditure from the Mifflin–St Jeor equation and an activity factor.
Daily energy
2,693 kcal
Estimate for weight maintenance
BMR
1,737 kcal
Activity factor
1.55
Basal metabolic rate uses the Mifflin–St Jeor equation. The activity factors are planning multipliers, not part of that 1990 paper. The result is an estimate of calories to maintain weight. It is not medical advice. These figures are estimates only. They are not a diagnosis, medical advice, nutritional advice, or a substitute for care from a qualified health professional.
Learn more
How this calculator works and what to know before using it
What this calculator does
Estimates the calories to maintain weight from resting metabolism and an activity factor.
How to use it
- Enter sex, age, weight, and height.
- Choose the activity level that matches a typical week.
- Read the daily energy and the resting figure it started from.
Formula used
Mifflin–St Jeor equation, times an activity factor
Mifflin–St Jeor. Men: 10×kg + 6.25×cm − 5×years + 5. Women: the same expression with − 161. Daily energy multiplies that result by 1.2, 1.375, 1.55, 1.725, or 1.9. Both results are rounded to the nearest calorie.
Source. Mifflin and colleagues, American Journal of Clinical Nutrition, February 1990. Men: 10×kg + 6.25×cm − 5×years + 5. Women: the same expression with − 161. This page multiplies that result by 1.2, 1.375, 1.55, 1.725, or 1.9. Those activity factors are separate from the 1990 paper. PubMed 2305711.
Updated November 1, 2026
Example
A 30-year-old man at 170 lb and 5 ft 10 in, with moderate activity, has a resting result of 1,737 kcal and a daily energy of 2,693 kcal.
Good to know
- The activity factors are planning multipliers. They are not part of the 1990 Mifflin paper.
- This is an estimate, not medical advice.
Common questions
- Is this the same equation as the calorie page?
- Yes. The same person and the same activity factor produce the same resting and maintenance calories.
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