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Read Nutrition · Energy expenditure
BMR Calculator
Discover the calories your body burns at complete rest.
Your details
Sex
Height
Weight
Your BMR
1598kcal/day
Activity level → daily calories
Sedentary1917 kcal
Lightly active2196.5625 kcal
Moderately active2476.125 kcal
Very active2755.6875 kcal
Athlete3035.25 kcal
What is BMR?
Your Basal Metabolic Rate (BMR) is the number of calories your body burns just to keep you alive — beating your heart, breathing, regulating temperature — while at complete rest. It is the foundation of every daily calorie estimate.
How BMR is calculated
Elements84 uses the Mifflin–St Jeor equation, considered the most accurate for general adults. Men: BMR = 10·weight(kg) + 6.25·height(cm) − 5·age + 5. Women: subtract 161 instead of adding 5.
Turning BMR into daily calories
Multiply your BMR by an activity factor (1.2 sedentary → 1.9 athlete) to estimate your full daily calorie burn (TDEE).
Category reference
| Category | Range |
|---|---|
| Sedentary | × 1.2 |
| Lightly active | × 1.375 |
| Moderately active | × 1.55 |
| Very active | × 1.725 |
| Athlete | × 1.9 |
Limitations & caveats
- BMR is an estimate — actual rates vary with muscle mass, hormones and genetics.
- Mifflin–St Jeor designed for adults 19–80.
- Pregnancy, lactation and certain medical conditions shift BMR.
- Trackers often differ ±10% — pick one consistent source.
- Excludes TEF (digestion) and NEAT (daily activity).
FAQ
Frequently asked questions
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How we ground the BMR
Grade A · Clinical guidelines & meta-analysesLast reviewed Nov 1, 2025
Named clinical guidelines
- Mifflin–St Jeor equation (most accurate for general adults)
- Academy of Nutrition and Dietetics
References
- Mifflin MD et al. — A new predictive equation for resting energy expenditure in healthy individuals· American Journal of Clinical Nutrition
- Academy of Nutrition and Dietetics — Adult Weight Management Guidelines· AND