BMR Calculator
Your Basal Metabolic Rate is the calories your body burns at rest — keeping the lights on, no movement. It's the floor of your daily energy need.
Your BMR
Calories per day at rest
0
kcal/day
This is the absolute minimum your body needs just to keep functioning. To estimate your real daily need, see TDEE.
The Mifflin-St Jeor formula
W in kg, H in cm, A in years. The constant s = +5 for males and −161 for females.
Why Mifflin-St Jeor
It's the most accurate of the common BMR formulas for modern populations, according to the American Dietetic Association. Older formulas (Harris-Benedict from 1919, revised 1984) tend to overestimate by ~5%.
Estimate — not medical advice
The numbers here are estimates built on population averages and published formulas. Any individual can sit well away from the average, so treat the output as a rough guide rather than a measurement of you specifically. It isn't a medical assessment, and it can't account for your history, medications, or anything a clinician would notice.