Calorie Calculator - TDEE & Maintenance
Determine how many calories you need daily to lose, maintain, or gain weight. Our free Calorie Calculator processes your stats locally for 100% health data privacy.
What is the Calorie Calculator?
Whether your goal is to lose fat or build muscle, knowing your Total Daily Energy Expenditure (TDEE) is the critical first step. This calculator uses the Mifflin-St Jeor equation to estimate your Basal Metabolic Rate (BMR) and multiplies it by your activity level to determine your daily calorie needs. We respect your health privacy—therefore, this tool operates entirely client-side. Your age, weight, and goals are processed instantly in your browser and are never transmitted to any external server.
Why Use Our Calorie Calculator?
- Accurate Math: Uses the industry-standard Mifflin-St Jeor equation.
- Goal Oriented: Provides specific calorie targets for fat loss, maintenance, and bulking.
- Total Privacy: Your health metrics never leave your device.
- Instant Results: No loading screens or sign-ups required.
How to Use the Calorie Calculator
Enter your age, gender, weight, and height.
Select your current physical activity level (from sedentary to very active).
Click calculate to instantly generate your TDEE.
Review the customized calorie targets for your specific weight goals.
Frequently Asked Questions
Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a day, including exercise and basic bodily functions.
No. The calculator is completely private. All processing happens in your browser.
Yes, it is widely considered the most accurate formula for estimating BMR in modern clinical settings.
All file processing is performed locally in your web browser. We do not upload, store, or view your data.