A BMR Calculator estimates how many calories your body needs to perform essential functions while at complete rest. These functions include breathing, blood circulation, and maintaining normal body temperature. BMR stands for Basal Metabolic Rate.
Knowing your estimated BMR can help you better understand your daily energy needs and plan your nutrition according to your fitness goals.
BMR Calculator
Estimate the calories your body needs at rest using your age, gender, height, and weight.
Your Estimated Basal Metabolic Rate
0 calories per day at rest (kcal/day)This is an estimate of the energy your body uses for essential functions at rest. Your total daily calorie needs are generally higher once normal movement and exercise are included.
This calculator uses the Mifflin-St Jeor equation, a commonly used estimate for adults. It is not a direct measurement of metabolism and may not accurately reflect every individual. It is intended for adults aged 18 and over. Consult a qualified healthcare professional for personalized nutrition advice.
How Does a BMR Calculator Work?
This calculator uses your age, gender, weight, and height to estimate your basal metabolic rate using the Mifflin-St Jeor equation.
- Age: Your estimated energy needs generally change as you get older.
- Gender: The equation uses a sex-specific constant.
- Weight: Your body weight contributes to your estimated calorie needs.
- Height: Height is another factor in the calculation.
BMR vs. TDEE: What Is the Difference?
BMR estimates the calories your body needs at rest. Total Daily Energy Expenditure (TDEE) estimates your total daily calorie needs after accounting for physical activity and exercise.
Your BMR is not the same as the number of calories you should eat each day. Your actual energy needs also depend on your activity level and other individual factors.
Important: BMR results are estimates, not medical advice. This calculator is intended for general informational use and does not replace personalized nutrition guidance.