Basal Metabolic Rate Calculator
Calculate the number of calories your body needs at rest
About this calculator
A Basal Metabolic Rate (BMR) calculator determines the minimum number of calories your body needs to maintain basic physiological functions while at complete rest. This includes breathing, circulation, cell production, nutrient processing, and protein synthesis. Understanding your BMR is crucial for weight management, fitness planning, and creating effective diet strategies, as it represents 60-70% of your total daily energy expenditure and serves as the foundation for calculating your complete caloric needs.
How to use
Enter your age, gender, height, and weight into the calculator fields. Select your preferred measurement units (metric or imperial). Click calculate to receive your BMR result, which shows the calories needed for basic bodily functions at rest. Use this number as a baseline for determining your total daily calorie requirements.
Frequently asked questions
What's the difference between BMR and TDEE?
BMR measures calories needed at complete rest, while TDEE (Total Daily Energy Expenditure) includes BMR plus calories burned through daily activities and exercise.
How accurate are BMR calculations?
BMR calculators provide estimates with 90-95% accuracy for most people. Individual variations in muscle mass, genetics, and metabolism can affect actual values.
Should I eat only my BMR calories to lose weight?
No, eating only BMR calories is too restrictive and unhealthy. Create a moderate deficit from your TDEE for safe, sustainable weight loss.