TDEE Calculator

TDEE Calculator is a fast, accurate, and completely free online tool designed to help you estimate your Total Daily Energy Expenditure (TDEE) and plan your daily calorie intake with confidence. By entering your age, sex, height, weight, and activity level, you can instantly calculate your maintenance calories and receive practical targets for fat loss, muscle gain, or weight maintenance. This tool is built for anyone who wants to take control of their nutrition and body composition, whether you are just starting your fitness journey or are an experienced athlete looking to fine-tune your intake. The calculator uses the proven Mifflin-St Jeor equation, which research in the American Journal of Clinical Nutrition has shown to be one of the most accurate ways to estimate resting metabolic rate in healthy adults. This means your results are based on real physiology, not guesswork. In addition to your daily calorie baseline, TDEE Calculator provides helpful insights including calorie deficit and surplus recommendations, macro guidance, and activity-based adjustments so you can create a plan that fits your lifestyle and goals. The interface is designed for speed, clarity, and practical use, allowing you to input your details in either imperial or metric units and get your results instantly. Whether you are trying to lose weight, build muscle, or maintain your current physique, TDEE Calculator gives you a simple, evidence-based starting point that you can refine over time using real-world results. The tool is completely free to use with no hidden fees or subscriptions, making reliable nutrition information accessible to everyone.

Mifflin-St Jeor Equation Calculation

This calculator uses the scientifically validated Mifflin-St Jeor equation to estimate your Basal Metabolic Rate (BMR). For men, the formula is BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age) + 5. For women, the formula is BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age) - 161. This equation has been proven in clinical research to be one of the most accurate methods for estimating resting metabolic rate in healthy adults, providing a reliable foundation for your TDEE calculation.

Activity Level Adjustments

The calculator applies a specific activity factor to your BMR to calculate your total daily energy expenditure. Activity levels range from Sedentary (1.2) for desk workers with little exercise, through Light Exercise (1.375), Moderate Exercise (1.55), Heavy Exercise (1.725), to Athlete (1.9) for those with multiple daily training sessions or highly physical occupations. This ensures your calorie estimate accurately reflects your actual lifestyle and movement patterns.

Dual Unit System

Users can input their details in either imperial units (pounds and inches) or metric units (kilograms and centimeters), making the tool accessible to a global audience. The interface automatically adjusts to display the appropriate unit labels based on your selection, and all calculations are performed accurately regardless of which measurement system you choose. This flexibility eliminates the need for manual conversions and reduces the chance of input errors.

Instant Results with Copy and Share

After entering your details and clicking the Calculate TDEE button, your results are displayed immediately with no loading time. The tool includes convenient copy and share buttons that allow you to easily save your results or send them to a coach, friend, or nutritionist. This feature is particularly useful for tracking your progress over time or sharing your baseline numbers with a healthcare professional for further guidance.

Weight Loss Planning

For individuals aiming to lose weight, TDEE Calculator provides the essential starting point of your maintenance calories. By knowing your TDEE, you can create a calorie deficit of roughly 250 to 500 calories per day, which typically leads to sustainable fat loss of about 0.5 to 1 pound per week. The calculator helps you understand exactly how many calories your body burns daily, allowing you to set a realistic and effective calorie target that supports fat loss while still providing enough energy for daily activities and workouts.

Muscle Building and Bulking

For those focused on building muscle mass, knowing your TDEE is critical for creating an effective calorie surplus. Consuming approximately 200 to 350 calories above your maintenance level each day provides the extra energy your body needs to build new muscle tissue without excessive fat gain. TDEE Calculator gives you a precise baseline to work from, and you can monitor your weight over two to three weeks to fine-tune your surplus and optimize your muscle-building progress.

Weight Maintenance and Lifestyle Balance

Many people want to maintain their current weight and body composition without the stress of strict dieting. By calculating your TDEE, you can understand exactly how many calories your body needs each day to stay at a stable weight. This knowledge allows you to plan meals and snacks that match your energy output, making it easier to maintain your physique while still enjoying a flexible and balanced diet that fits your lifestyle and preferences.

Performance Optimization for Athletes

Athletes and highly active individuals can use TDEE Calculator to ensure they are eating enough to support their training demands. Eating well below your TDEE for extended periods can negatively impact recovery, hormone function, and training quality. By knowing your exact calorie needs based on your activity level, you can design a nutrition plan that fuels your workouts, supports muscle repair, and maintains energy levels throughout the day, helping you perform at your best.

What does TDEE mean?

TDEE stands for Total Daily Energy Expenditure, which is the total amount of calories your body uses over an entire day. It includes your Basal Metabolic Rate (the energy needed to keep you alive at rest), the energy required to digest and process food, and the calories burned through all movement and exercise. Understanding your TDEE is the foundation for any weight management or fitness goal.

How is TDEE different from BMR?

BMR, or Basal Metabolic Rate, is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest. TDEE takes your BMR and adds the calories burned through digestion and all physical activity. So your TDEE is always higher than your BMR, and the difference depends on how active you are throughout the day.

How many calories should I eat to lose weight?

To lose weight, you should consume fewer calories than your TDEE, creating a calorie deficit. A common and sustainable approach is to aim for a daily deficit of 250 to 500 calories below your maintenance level. This typically results in a weight loss of about 0.5 to 1 pound per week. It is important to treat your TDEE as a starting estimate and adjust based on your actual results over two to three weeks.

How accurate is this calculator?

The Mifflin-St Jeor equation used by this calculator is considered one of the most accurate formulas for estimating resting metabolic rate in healthy adults, according to research published in the American Journal of Clinical Nutrition. However, it is still an estimate and individual variations can occur. For best results, use your TDEE as a starting point, track your weight consistently for two to three weeks, and adjust your calorie intake by about 100 to 200 calories if needed based on your real-world results.