BMR Calculator

Calculate your Basal Metabolic Rate (BMR) to understand how many calories your body needs at rest. Essential for weight management, fitness planning, and optimizing your nutrition.

Your Information

Your Results

Basal Metabolic Rate (BMR) 0

Calories your body needs at complete rest

Daily Calorie Needs 0

Based on your activity level

Interpretation

Your results will appear here after calculation.

BMR represents the number of calories your body needs to perform basic life-sustaining functions.

Health Tips

  • • For weight loss, consume 300-500 calories below your daily needs
  • • For muscle gain, consume 300-500 calories above your daily needs
  • • Re-calculate your BMR every 3-6 months or after significant weight changes

Understanding Your Basal Metabolic Rate

Your Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest. Understanding your BMR is the foundation for effective weight management, fitness planning, and nutritional optimization.

Why is BMR Important?

Knowing your BMR helps you:

  • Create personalized nutrition plans tailored to your body's needs
  • Set realistic weight loss or muscle gain goals
  • Understand how your body uses energy throughout the day
  • Adjust your calorie intake based on changes in activity levels
  • Make informed decisions about your health and fitness journey

How Our BMR Calculator Works

Our premium calculator uses the Mifflin-St Jeor Equation, recognized as the most accurate BMR formula for healthy individuals. We calculate your BMR based on your gender, age, weight, and height. Then, using your activity level, we determine your total daily calorie needs.

Benefits of Using This Tool

  • Completely Free: Access premium health calculations at no cost
  • Instant Results: Get your BMR and calorie needs in seconds
  • Personalized: Calculations tailored to your specific body metrics
  • Privacy Focused: Your data never leaves your browser
  • Accurate: Based on scientifically validated formulas

Frequently Asked Questions

What is the difference between BMR and TDEE?

BMR (Basal Metabolic Rate) is the calories your body burns at rest. TDEE (Total Daily Energy Expenditure) is the total calories you burn in a day, including physical activity. TDEE = BMR × Activity Multiplier.

How often should I recalculate my BMR?

You should recalculate your BMR every 3-6 months or after significant weight changes (5kg or more) as your metabolism adjusts to your new weight.

Can BMR change over time?

Yes, BMR decreases with age (about 1-2% per decade after 20) and with weight loss. Muscle mass also affects BMR - more muscle means higher BMR.

Is this calculator accurate for athletes?

While accurate for most people, athletes with very high muscle mass may find the calculation slightly underestimates their true BMR. Consider consulting a sports nutritionist for specialized assessment.

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