1. What is Total Daily Energy Expenditure (TDEE)?

Total Daily Energy Expenditure (TDEE) is an estimate of how many calories you burn per day when exercise is taken into account. It is calculated by first figuring out your Basal Metabolic Rate (BMR), then multiplying that value by an activity multiplier.

2. How Does the Calculator Work?

The calculator uses the TDEE equation:

Where:

• \( BMR \) — Basal Metabolic Rate (kcal/day)
• \( Activity\ Factor \) — Multiplier based on activity level (dimensionless)

Activity Factors:

• Sedentary (little or no exercise): 1.2
• Lightly active (light exercise 1-3 days/week): 1.375
• Moderately active (moderate exercise 3-5 days/week): 1.55
• Very active (hard exercise 6-7 days/week): 1.725
• Extra active (very hard exercise, physical job): 1.9

3. Importance of TDEE Calculation

Details: Knowing your TDEE is essential for weight management. To lose weight, you need to consume fewer calories than your TDEE; to gain weight, you need to consume more calories than your TDEE.

4. Using the Calculator

Tips: Enter your BMR in kcal/day and select your activity level based on your weekly exercise routine. All values must be valid (BMR > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and TDEE?
A: BMR (Basal Metabolic Rate) is the number of calories your body needs to perform basic life-sustaining functions, while TDEE (Total Daily Energy Expenditure) includes all calories burned through activity and exercise.

Q2: How accurate is the TDEE calculation?
A: The calculation provides a good estimate, but individual variations in metabolism, body composition, and activity patterns can affect accuracy.

Q3: Should I use my TDEE for weight loss?
A: Yes, creating a calorie deficit of 500-1000 calories per day below your TDEE can result in a safe weight loss of 1-2 pounds per week.

Q4: How often should I recalculate my TDEE?
A: You should recalculate your TDEE whenever your weight changes significantly or your activity level changes substantially.

Q5: Can TDEE change over time?
A: Yes, TDEE can change with age, weight fluctuations, changes in muscle mass, and alterations in activity levels.