BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using either Metric or Imperial units. Estimate the number of calories your body burns each day while at complete rest.
What Is Basal Metabolic Rate (BMR)?
Basal Metabolic Rate (BMR) is the number of calories your body needs to perform essential life-sustaining functions while completely at rest. These functions include breathing, blood circulation, regulating body temperature, cell repair, and keeping your organs functioning properly.
Your BMR represents the minimum amount of energy your body requires every day. It does not include calories burned through walking, exercise, work, or other physical activities.
This calculator estimates your BMR using the Mifflin–St Jeor Equation, one of the most widely recommended formulas for estimating daily calorie requirements in healthy adults.
Factors That Affect Your BMR
| Factor | How It Affects BMR |
|---|---|
| Age | BMR generally decreases with age. |
| Gender | Males usually have a higher BMR because they tend to have more lean muscle mass. |
| Height | Taller people generally burn more calories at rest. |
| Weight | Heavier individuals usually require more energy to maintain body functions. |
| Muscle Mass | More muscle increases resting calorie expenditure. |
What Should You Calculate Next?
Your BMR tells you how many calories your body burns while completely at rest. If you’d like to understand your results in more detail, explore our BMR Guides and Articles . You’ll find practical information about how Basal Metabolic Rate works, what affects it, and how to use it for healthier weight management.
Once you know your BMR, the next step is calculating your Total Daily Energy Expenditure (TDEE). Your TDEE includes your daily activity level and estimates the total calories your body needs each day for maintaining, losing, or gaining weight.
Use our TDEE Calculator to calculate your daily calorie needs based on your lifestyle and activity level.