BMR Calculator
Basal Metabolic Rate — the calories your body burns at complete rest.
This is a general estimate, not medical advice. Consult a healthcare provider before making significant diet changes.
Basal Metabolic Rate
1,749 kcal/day
Calories burned at complete rest
For informational and educational purposes only — not medical advice, and not a substitute for consulting a qualified professional about your specific situation. TrueMeasureKit is not liable for decisions made based on these results. See our Terms of Service.
BMR vs. TDEE — what's the difference?
BMR is the energy your body needs just to stay alive — breathing, circulation, cell repair — assuming you spent the entire day lying still. It does not include any activity, digestion, or exercise, which is why it's always lower than your actual daily calorie burn. This calculator uses the Mifflin-St Jeor equation, widely considered the most accurate BMR formula for the general population. To see your full daily calorie needs including activity level, check the TDEE calculator.
Frequently asked questions
What formula does this calculator use?
The Mifflin-St Jeor equation — widely regarded by dietitians as more accurate for most modern populations than the older Harris-Benedict formula, though both estimate the same thing: calories burned at complete rest.
Why is BMR always lower than TDEE?
BMR is calories burned doing absolutely nothing — just keeping your body alive. TDEE adds every calorie burned through movement, exercise, and digestion on top of that baseline, so it's always the larger number.