🔥 BMR Calculator
Calculate your Basal Metabolic Rate – the calories your body burns at rest
Male
Female
years
Your current age in years
kg
Your current weight in kilograms
cm
Your height in centimeters
Your BMR Results
BMR (Basal Metabolic Rate)
0
calories/day
Sedentary (Little Exercise)
0
calories/day
Light Activity (1-3 days/week)
0
calories/day
Moderate Activity (3-5 days/week)
0
calories/day
Very Active (6-7 days/week)
0
calories/day
Extra Active (Physical Job)
0
calories/day
What is BMR (Basal Metabolic Rate)?
BMR (Basal Metabolic Rate) is the number of calories your body burns at rest to maintain basic physiological functions like breathing, circulation, cell production, and brain function. It represents the minimum amount of energy needed to keep your body functioning while at rest.
BMR accounts for approximately 60-75% of your total daily calorie expenditure. Understanding your BMR is essential for weight management, as it helps you determine how many calories you need to maintain, lose, or gain weight.
Why Use Our BMR Calculator?
- Weight Management: Understand your baseline calorie needs for effective weight loss or gain
- Nutrition Planning: Plan your daily calorie intake based on your metabolic rate
- Fitness Goals: Calculate your Total Daily Energy Expenditure (TDEE) for different activity levels
- Metabolic Health: Track changes in your BMR over time
- Diet Planning: Create meal plans that align with your calorie needs
- Health Monitoring: Understand how age, weight, and height affect metabolism
How to Use the BMR Calculator
- Select Gender: Choose your biological gender (affects BMR calculation)
- Enter Age: Input your current age in years
- Enter Weight: Input your current weight in kilograms
- Enter Height: Input your height in centimeters
- Calculate: Click calculate to see your BMR and TDEE for different activity levels
Understanding Your Results
- BMR: Calories burned at complete rest (baseline metabolism)
- Sedentary: BMR × 1.2 (little to no exercise, desk job)
- Light Activity: BMR × 1.375 (light exercise 1-3 days per week)
- Moderate Activity: BMR × 1.55 (moderate exercise 3-5 days per week)
- Very Active: BMR × 1.725 (hard exercise 6-7 days per week)
- Extra Active: BMR × 1.9 (very hard exercise, physical job, or training twice a day)
Factors That Affect BMR
- Age: BMR decreases with age (approximately 2% per decade after age 20)
- Gender: Men typically have higher BMR due to more muscle mass
- Weight: Heavier individuals have higher BMR
- Height: Taller individuals have higher BMR
- Muscle Mass: More muscle increases BMR (muscle burns more calories than fat)
- Genetics: Some people naturally have faster or slower metabolisms
- Hormones: Thyroid hormones, growth hormone, and other hormones affect BMR
- Body Composition: Higher muscle-to-fat ratio increases BMR
Tips for Boosting Your Metabolism
- Build Muscle: Strength training increases muscle mass, which raises BMR
- Stay Active: Regular exercise increases your total daily calorie burn
- Eat Protein: Protein has a higher thermic effect and helps maintain muscle
- Stay Hydrated: Water is essential for metabolic processes
- Get Enough Sleep: Poor sleep can negatively affect metabolism
- Eat Regularly: Small, frequent meals may help maintain metabolism
- Avoid Crash Diets: Severe calorie restriction can lower BMR
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest, while TDEE (Total Daily Energy Expenditure) includes BMR plus calories burned through physical activity and digestion. TDEE is typically 1.2-1.9 times your BMR depending on activity level.
How accurate is the BMR calculation?
The Mifflin-St Jeor equation used in this calculator is considered one of the most accurate BMR formulas for the general population. However, individual variations in muscle mass, genetics, and health conditions can cause actual BMR to differ by 10-15% from calculated values.
Can I increase my BMR?
Yes, you can increase your BMR by building muscle through strength training, staying active, eating enough protein, getting adequate sleep, and maintaining a healthy weight. However, factors like age and genetics also play a role and cannot be changed.
Why do men have higher BMR than women?
Men typically have higher BMR because they generally have more muscle mass, larger body size, and different hormone levels (especially testosterone) compared to women. Muscle tissue burns more calories at rest than fat tissue, contributing to higher metabolic rates.
How many calories should I eat to lose weight?
To lose weight, you need to create a calorie deficit. A safe approach is to eat 500-1000 calories less than your TDEE per day, which results in 1-2 pounds of weight loss per week. Never eat below your BMR, as this can slow metabolism and cause muscle loss.