Understanding Your Basal Metabolic Rate (BMR)
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. Knowing your BMR helps you understand your body's energy needs.
BMR Calculator
Your Results
Your BMR is: 0 calories/day
Estimated Daily Calorie Needs:
- Sedentary: 0 calories
- Light activity: 0 calories
- Moderate activity: 0 calories
- Very active: 0 calories
- Extra active: 0 calories
What Affects Your BMR?
Several factors influence your BMR:
- Muscle mass: Muscle burns more calories than fat at rest
- Age: Metabolism slows with age
- Genetics: Some people inherit faster metabolisms
- Hormones: Thyroid hormones significantly impact BMR
- Pregnancy: Increases BMR due to fetal energy demands
Important Note
All BMR calculations are estimates. A 2005 meta-analysis showed that even when accounting for all known factors, 26% of BMR variation between individuals remains unexplained. Use this as a starting point and adjust based on your actual results.