BMR Calculator
Calculate Basal Metabolic Rate (BMR) and estimate daily calorie expenditure.
bmr calculator Inputs
About BMR Calculator
The Basal Metabolic Rate (BMR) & Daily Calorie Calculator computes resting metabolic calorie expenditure using the Mifflin-St Jeor and Harris-Benedict equations, providing Total Daily Energy Expenditure (TDEE) targets for weight loss, maintenance, and muscle gain.
How to Use BMR Calculator
Step 1
Select your biological gender and age.
Step 2
Enter your height and weight.
Step 3
Select your weekly physical activity level.
Step 4
Review your baseline BMR, maintenance TDEE, and fitness calorie targets.
Practical Use Cases for BMR Calculator
Fitness & Bodybuilding Caloric Planning
Determine exact daily caloric surplus targets for clean bulking or caloric deficit goals for healthy body fat reduction.
Clinical Nutrition & Dietetics
Estimate baseline resting energy requirements for medical dietary meal planning and macronutrient distribution.
Input & Output Examples
Calculating BMR for 30-Year-Old Male
Age: 30, Gender: Male, Height: 180 cm, Weight: 75 kg, Activity: Moderate
BMR: 1,720 kcal/day | TDEE: 2,666 kcal/day | Weight Loss Target: 2,166 kcal/day
Key Features & Performance
- ✓Implements validated Mifflin-St Jeor and Revised Harris-Benedict formulas.
- ✓Calculates Total Daily Energy Expenditure (TDEE) based on 5 activity multiplier tiers.
- ✓Supports Metric (kg/cm) and Imperial (lbs/feet/inches) measurement units.
- ✓Provides targeted calorie recommendations for Weight Loss (-500 kcal) and Weight Gain (+500 kcal).
- ✓100% Client-Side calculation ensures health data privacy.
Key Terminology & Definitions
Basal Metabolic Rate (BMR)
The minimum number of calories your body burns at complete physical rest to sustain vital biological functions (breathing, circulation, cell production).
TDEE (Total Daily Energy Expenditure)
The total number of calories burned in a 24-hour period factoring in BMR plus physical activity, exercise, and the thermic effect of food.