Calculate your Basal Metabolic Rate (BMR) - the number of calories your body burns at rest. BMR represents the minimum energy required to maintain vital body functions such as breathing, circulation, and cell production.
Your Basal Metabolic Rate
0
calories/day
What is BMR?
Basal Metabolic Rate (BMR) is the amount of energy expended while at rest in a neutrally temperate environment. It represents the minimum amount of energy needed to keep your body functioning, including breathing, circulating blood, controlling body temperature, and maintaining cell growth.
Available Formulas
Mifflin-St Jeor: The most accurate formula for most people, developed in 1990 and considered the gold standard.
Harris-Benedict: A classic formula revised in 1984, still widely used and reliable.
Katch-McArdle: Takes into account lean body mass, making it more accurate for athletic individuals who know their body fat percentage.
How to Use This Calculator
Enter your age in years
Select your biological sex
Input your height in centimeters
Input your weight in kilograms
Choose your preferred calculation formula
If using Katch-McArdle, enter your body fat percentage
Click "Calculate BMR" to see your results
Understanding Your Results
Your BMR value represents the number of calories your body needs to maintain basic physiological functions at rest. To determine your total daily energy expenditure (TDEE), you'll need to multiply your BMR by an activity factor:
Sedentary (little to 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 (twice per day): BMR × 1.9
Important Disclaimer
This calculator provides estimates based on statistical formulas. Individual metabolic rates can vary due to factors such as genetics, muscle mass, hormones, medications, and health conditions. Always consult with a healthcare professional or registered dietitian for personalized nutritional advice.