Find answers to common questions about TDEE calculation, BMR, macronutrients, and how to use this calculator effectively.
TDEE stands for Total Daily Energy Expenditure. It represents the total number of calories you burn in a day, including your Basal Metabolic Rate (BMR) and calories burned through physical activity and exercise.
BMR (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 rest. It typically accounts for 60-75% of your total daily calorie expenditure.
The Mifflin-St Jeor Equation is considered one of the most accurate formulas for estimating BMR and TDEE. Studies show it has an accuracy rate of approximately 90% for most individuals. However, individual variations in metabolism, body composition, and other factors can affect accuracy.
Select the activity level that best matches your typical week: Sedentary (little to no exercise), Lightly Active (light exercise 1-3 days/week), Moderately Active (moderate exercise 3-5 days/week), Very Active (hard exercise 6-7 days/week), or Extremely Active (very hard exercise and physical job or training twice per day).
Choose Weight Loss if you want to lose fat, Maintenance if you want to maintain your current weight, or Muscle Gain if you want to build muscle mass. The calculator will adjust your calorie target accordingly: -500 calories for weight loss, no change for maintenance, and +300 calories for muscle gain.
With a 500-calorie daily deficit (weight loss goal), you can expect to lose approximately 0.5 kg (1 lb) per week. This is considered a safe and sustainable rate of weight loss. Faster weight loss may lead to muscle loss and is harder to maintain long-term.
Macronutrients are the three main nutrients your body needs in large amounts: Protein (builds and repairs tissue), Carbohydrates (primary energy source), and Fats (essential for hormone production and nutrient absorption). Each gram of protein and carbs provides 4 calories, while fat provides 9 calories per gram.
The macro ratios are optimized for your goal: Weight Loss (40% protein, 30% carbs, 30% fat) emphasizes protein to preserve muscle; Maintenance (30% protein, 40% carbs, 30% fat) provides balanced nutrition; Muscle Gain (30% protein, 45% carbs, 25% fat) increases carbs for energy during training.
No, your TDEE already includes calories burned through your selected activity level. Eating back exercise calories would result in consuming more than your target and could prevent you from reaching your goals.
Recalculate your TDEE every 4-6 weeks or whenever you experience significant weight changes (5+ lbs or 2+ kg), changes in activity level, or if your progress stalls. Your calorie needs change as your body composition changes.
This calculator is designed for healthy adults aged 18-80. It may not be accurate for pregnant or breastfeeding women, competitive athletes, individuals with metabolic disorders, or those under 18. Consult a healthcare professional for personalized advice.
Different calculators may use different formulas (Harris-Benedict, Katch-McArdle, etc.) or activity multipliers. Our calculator uses the scientifically-validated Mifflin-St Jeor Equation, which is considered more accurate for modern populations.
Eating significantly below your recommended calories can slow your metabolism, cause muscle loss, lead to nutrient deficiencies, and make weight loss harder to maintain. Stick to a moderate deficit of 500 calories for sustainable results.
While calories determine weight change, tracking macros ensures you get adequate protein (to preserve muscle), sufficient fats (for hormones), and appropriate carbs (for energy). Macro tracking is especially important for body composition goals.
Men typically have higher TDEEs than women due to greater muscle mass and different hormonal profiles. The Mifflin-St Jeor Equation accounts for these differences by using different constants for male and female calculations.
Choose the activity level that best represents your total daily activity, including both work and exercise. If you have a desk job but exercise 3-5 times per week, "Moderately Active" is likely appropriate. Monitor your results and adjust if needed.
No. All calculations are performed locally in your browser, and your data is only stored on your device using localStorage. We do not collect, store, or share any personal information with servers or third parties.
Yes! Select "Muscle Gain" as your goal. The calculator adds 300 calories to your TDEE and adjusts macros to support muscle growth. For optimal results, combine this with progressive resistance training and adequate protein intake.
If your weight is not changing after 2-3 weeks, your actual TDEE may differ from the calculation. Adjust your calorie intake by 100-200 calories and monitor for another 2-3 weeks. Factors like water retention, stress, and sleep can also affect weight.
Daily weigh-ins can help you track trends, but weight fluctuates due to water retention, food volume, and hormones. Focus on weekly averages rather than daily changes. Weigh yourself at the same time each day (preferably morning, after bathroom, before eating) for consistency.
This calculator provides estimates based on scientific formulas. For personalized nutrition advice, especially if you have specific health conditions or athletic goals, consult with a registered dietitian or healthcare professional.