BMR Calculator
Calculate your Basal Metabolic Rate (BMR) to understand how many calories your body needs at rest.
Enter your details
Your BMR
Please enter your height and weight to calculate your BMR.
Your Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological functions at rest. This value can help you understand your daily caloric needs for weight management.
Note: The BMR calculation is based on the Mifflin-St Jeor Equation, which is widely used for estimating BMR.
Frequently Asked Questions
What is BMR (Basal Metabolic Rate)?
BMR is the number of calories your body needs to maintain basic physiological functions while at complete rest. This includes breathing, circulation, cell production, nutrient processing, and maintaining body temperature.
How is BMR calculated using the Mifflin-St Jeor equation?
The Mifflin-St Jeor equation is considered the most accurate BMR formula. For men: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age + 5. For women: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age - 161.
What's the difference between BMR and TDEE?
BMR is calories needed at complete rest, while TDEE (Total Daily Energy Expenditure) includes calories burned through daily activities and exercise. TDEE = BMR × activity factor (1.2 for sedentary to 1.9 for very active).
How accurate is the BMR calculation?
The Mifflin-St Jeor equation is accurate within about 10% for most people. However, factors like muscle mass, genetics, hormones, and medical conditions can affect your actual BMR. It's a good starting point for calorie planning.
Why do men and women have different BMR formulas?
Men typically have more muscle mass and less body fat than women of the same weight and height. Muscle tissue burns more calories than fat tissue, so men generally have a higher BMR.
How can I use my BMR for weight management?
Your BMR helps determine daily calorie needs. To lose weight, eat fewer calories than your TDEE. To gain weight, eat more. Never go below your BMR for extended periods as this can slow your metabolism.
Does BMR change with age?
Yes, BMR typically decreases with age due to loss of muscle mass and slower cellular processes. This is why calorie needs often decrease as we get older, especially after age 30.
Can I increase my BMR?
Yes! Building muscle through strength training is the most effective way to increase BMR since muscle burns more calories than fat. Staying hydrated, getting enough sleep, and eating protein can also help maintain a healthy BMR.