Calculate Your BMR
What is BMR and Why it Matters
Your Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic functions at rest. Understanding your BMR is crucial for maintaining a healthy weight and overall well-being.
How to Use This Calculator
Using our BMR calculator is simple. Just follow these steps:
- Enter your age, weight, height, and gender.
- Select your activity level.
- Click ‘Calculate’.
Formula & Methodology
Our calculator uses the Mifflin-St. Jeor equation to estimate your BMR:
For men: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
For women: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161
Real-World Examples
Let’s look at three case studies:
- John, 30 years old, 80 kg, 180 cm, male, sedentary: BMR = 1,845 calories/day
- Jane, 25 years old, 65 kg, 165 cm, female, moderately active: BMR = 1,412 calories/day
- Mike, 35 years old, 90 kg, 185 cm, male, very active: BMR = 2,078 calories/day
Data & Statistics
BMR Comparison by Gender
| Age (years) | Men (calories/day) | Women (calories/day) |
|---|---|---|
| 20 | 1,800 | 1,300 |
| 30 | 1,900 | 1,400 |
| 40 | 1,950 | 1,450 |
BMR vs. Activity Level
| Activity Level | Calories/day |
|---|---|
| Sedentary | 1.2 × BMR |
| Lightly active | 1.375 × BMR |
| Moderately active | 1.55 × BMR |
| Very active | 1.725 × BMR |
| Extra active | 1.9 × BMR |
Expert Tips
- To maintain your weight, aim for a daily caloric intake equal to your BMR multiplied by your activity level.
- To lose weight, reduce your daily caloric intake by 500 calories.
- To gain weight, increase your daily caloric intake by 500 calories.
FAQ
What is the difference between BMR and TDEE?
BMR is the number of calories your body needs to perform basic functions at rest. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by your activity level.
How often should I recalculate my BMR?
It’s a good idea to recalculate your BMR every time you experience a significant change in weight, activity level, or age.
For more information, see the CDC’s guide on BMR and the Mayo Clinic’s article on metabolism.