The BMR Calculator is a free, easy-to-use online tool that helps you determine your Basal Metabolic Rate – the number of calories your body burns at rest to maintain vital functions like breathing, circulation, and cell production. What is BMR?
Understanding your BMR is crucial for nutrition planning, Weight Management, Fitness Goals, and health monitoring.
BMR Calculator
Basal Metabolic Rate Calculator
Your BMR is
0 calories/day
Your Basal Metabolic Rate (BMR) represents the minimum amount of energy (calories) your body needs to function while at complete rest. This includes the energy required for:
- Breathing and circulation
- Cell production and repair
- Nutrient processing
- Maintaining body temperature
- Brain and nerve function
How to Use This BMR Calculator
Step 1: Enter Your Age
- Input your age in years (between 1-120)
- Age affects metabolism as it naturally slows with time
Step 2: Select Your Gender
- Choose Male or Female
- Gender impacts BMR due to differences in muscle mass and hormonal composition
Step 3: Enter Your Weight
- Input your weight in kilograms (kg)
- Higher body weight typically results in higher BMR
Step 4: Enter Your Height
- Input your height in centimeters (cm)
- Taller individuals generally have higher metabolic rates
Step 5: Calculate
- Click the “Calculate BMR” button
- Your result will appear instantly below the form, showing your daily caloric burn at rest
Step 6: Clear (Optional)
- Use the “Clear” button to reset all fields and start a new calculation
Understanding Your Results
Your BMR result shows the number of calories your body burns per day at complete rest. This is your baseline – you’ll need additional calories for any physical activity throughout the day.
To calculate Total Daily Energy Expenditure (TDEE):
- Sedentary (little/no exercise): BMR × 1.2
- Lightly active (1-3 days/week): BMR × 1.375
- Moderately active (3-5 days/week): BMR × 1.55
- Very active (6-7 days/week): BMR × 1.725
- Extremely active (athlete level): BMR × 1.9
Formula Used
This calculator uses the Mifflin-St Jeor Equation, one of the most accurate BMR formulas:
For Men: BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) – (5.677 × age)
For Women: BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) – (4.330 × age)
Key Features
✓ Instant Results – Calculate your BMR in seconds ✓ Accurate Formula – Uses the scientifically-validated Mifflin-St Jeor equation ✓ User-Friendly Interface – Clean, intuitive design ✓ Mobile Responsive – Works perfectly on all devices ✓ Free to Use – No registration or payment required ✓ Privacy-Focused – All calculations done locally in your browser
Why Calculate Your BMR?
Knowing your BMR helps you make informed decisions about nutrition and fitness. Whether you’re looking to lose weight, gain muscle, or maintain your current physique, understanding your baseline caloric needs is the first step toward achieving your health goals.
Start using the BMR Calculator today to take control of your health journey!