Calculate your Basal Metabolic Rate to understand how many calories your body needs at rest. Essential for weight management and fitness planning.
This is the number of calories your body needs to perform basic life-sustaining functions at complete rest.
Understand the science behind Basal Metabolic Rate and how to use it for your health goals
Provide your gender, age, weight, and height. These factors significantly influence your metabolic rate.
Our calculator uses the Mifflin-St Jeor Equation, the most accurate formula for BMR calculation.
Your BMR helps determine your daily calorie needs for weight maintenance, loss, or gain.
This equation is considered the most accurate for calculating BMR in healthy individuals. It accounts for the differences in metabolism between men and women.
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Our calculator provides accurate, reliable results with these key benefits
Uses the scientifically validated Mifflin-St Jeor Equation for precise BMR calculation.
Calculations are tailored to your specific gender, age, weight, and height.
All calculations happen locally in your browser. We never store your personal data.
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Learn how to use your BMR results effectively for your health goals.
Get answers to common questions about BMR and metabolism
Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions while at complete rest. These functions include breathing, circulation, cell production, nutrient processing, protein synthesis, and ion transport. Essentially, it's the number of calories you would burn if you stayed in bed all day.
BMR (Basal Metabolic Rate) represents the calories needed for basic bodily functions at complete rest. TDEE (Total Daily Energy Expenditure) includes BMR plus calories burned through daily activities and exercise. To calculate TDEE, you multiply your BMR by an activity factor (sedentary: 1.2, light activity: 1.375, moderate: 1.55, very active: 1.725, extra active: 1.9).
Knowing your BMR helps you understand your baseline calorie needs. To lose weight, you need to consume fewer calories than your TDEE (which is based on your BMR). To gain weight, you need to consume more. A safe weight loss goal is typically creating a deficit of 500-1000 calories per day from your TDEE, resulting in 1-2 pounds of weight loss per week.
Yes, you can influence your BMR through several factors:
The Mifflin-St Jeor Equation is considered the most accurate BMR formula for the general population, with an accuracy of about ±10%. It's more reliable than the older Harris-Benedict Equation. However, individual variations in body composition, genetics, and health conditions can affect actual BMR. For the most precise measurement, clinical methods like indirect calorimetry are used.
Use our BMR calculator as the foundation for your fitness and nutrition plan