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BMR Calculator - Basal Metabolic Rate & Energy Expenditure

Calculate your Basal Metabolic Rate (BMR) to understand how many calories your body burns at rest. Learn about metabolism, TDEE, and how to fuel your body correctly.

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BMR Calculator: Understanding Your Body's Internal Engine

Every second of every day, your body is performing millions of invisible tasks: pumping blood, regenerating cells, and regulating hormones. All of these processes require energy. Your Basal Metabolic Rate (BMR) is the precise number of calories your body needs to perform these life-sustaining functions while at complete rest.

1. Why BMR is the Foundation of Your Diet

Think of your BMR as your "Idle Speed." If you stayed in bed all day and didn't move a muscle, this is the amount of fuel your body would still consume. Understanding this number is critical because it represents the absolute minimum amount of energy you should consume to keep your organs functioning correctly.

For a complete look at your health profile, you should also calculate your BMI and check your Ideal Weight.

2. From BMR to TDEE

While BMR is your base, your Total Daily Energy Expenditure (TDEE) includes your BMR plus the energy used for daily movement and exercise. You can find your full daily needs using our Calorie Calculator.

3. Factors That Influence Metabolism

  • Muscle Mass: Muscle is metabolically active. The more muscle you have, the higher your BMR. Calculate your Body Fat Percentage to see how much of your weight is lean mass.
  • Age: BMR generally decreases as we age due to the natural loss of muscle tissue.
  • Genetics: Some individuals naturally have a "Faster" or "Slower" metabolism.

4. FAQ

Q: Can I eat fewer calories than my BMR? A: Generally, no. Consuming less than your BMR for long periods can lead to "Metabolic Adaptation," where your body slows its vital processes to save energy, leading to fatigue and stalled weight loss.

Q: How do I increase my BMR? A: The most effective way is to build muscle through resistance training.

Conclusion

Your BMR is the map for your nutritional journey. By knowing your base, you can make informed decisions about your daily caloric intake. Enter your details above to discover your unique metabolic rate.