BMITool · Free health calculator
BMR Calculator: Basal Metabolic Rate
Estimate your basal metabolic rate using the Mifflin–St Jeor equation and understand how a resting-energy estimate differs from your total daily calorie expenditure.
What BMR means
BMR is a predictive estimate of energy expenditure under resting conditions. It is not a laboratory measurement of metabolism.
BMR vs TDEE
TDEE adds activity and other components to create a broader estimate of daily energy expenditure. Use the TDEE Calculator when your question is about total daily calorie needs.
Why the estimate varies
Age, height, weight, sex and the chosen equation affect the result. Use calculator outputs as estimates rather than exact measurements.