BMR Calculator
Calculate your Basal Metabolic Rate (BMR) and daily calorie needs.
Results will appear here
Enter your details to calculate your BMR.
What is a BMR Calculator?
A Basal Metabolic Rate (BMR) calculator estimates the number of calories your body burns at complete rest over 24 hours. This is the energy required for basic life-sustaining functions like breathing, circulation, and cell production. Knowing your BMR is the first step to determining your Total Daily Energy Expenditure (TDEE), which is the total calories you burn in a day, including physical activity.
How to Use This Tool
- Select Your Units: Choose between Metric (kg, cm) or Imperial (lbs, ft, in).
- Enter Your Details: Input your gender, age, height, and weight.
- Choose a Formula: Select either the Mifflin-St Jeor (more modern and generally recommended) or the Harris-Benedict formula.
- Click "Calculate BMR": The tool will instantly show your BMR and your estimated TDEE for various activity levels, from sedentary to very active.