Estimate basal metabolic rates based on height, weight, gender, and age.
Calculator Parameters
Enter details and click calculate to view the results instantly.
Calculation Examples
Scenario Inputs
Output Result
age : 25, gender : male , weight : 70, height : 175
BMR: ~ 1,656 Calories/day
About BMR Calculator
Basal Metabolic Rate (BMR) Calculator. Estimate basal metabolic rates based on height, weight, gender, and age. Starlightopia provides this tool completely free and online, optimized for instant, accurate computations.
How It's Calculated
What is the Harris-Benedict equation for BMR?
The Harris-Benedict equation is a classic formula that calculates daily resting energy expenditure using your weight, height, age, and biological sex.
Technical Specifications
CategoryHealth
Target ValueBMR (Calories/Day)
Inputs Required (4)
Age (Years) (number)
Gender (select)
Weight (kg) (number)
Height (cm) (number)
Frequently Asked Questions
What does Basal Metabolic Rate (BMR) mean?
BMR is the baseline number of calories your body needs to perform vital survival functions while at complete rest.
What is the Harris-Benedict equation for BMR?
The Harris-Benedict equation is a classic formula that calculates daily resting energy expenditure using your weight, height, age, and biological sex.
How does aging affect your BMR?
BMR naturally slows down as you age due to the gradual loss of lean muscle tissue.
What is the main difference between BMR and TDEE?
BMR measures your energy expenditure at rest, while Total Daily Energy Expenditure (TDEE) adds physical activity levels to that baseline.
Can I increase my BMR to burn more calories?
Yes, building muscle mass through resistance training increases your BMR, as muscle burns more calories at rest than fat tissue.