1. What is TDEE?

TDEE (Total Daily Energy Expenditure) represents the total number of calories you burn in a day, including basal metabolic rate (BMR) and activity level. It's the number of calories needed to maintain your current weight.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation for BMR and multiplies by activity factor:

Where BMR is calculated as:

• For men: \( BMR = (10 \times weight\ in\ kg) + (6.25 \times height\ in\ cm) - (5 \times age\ in\ years) + 5 \)
• For women: \( BMR = (10 \times weight\ in\ kg) + (6.25 \times height\ in\ cm) - (5 \times age\ in\ years) - 161 \)

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, consume fewer calories than your TDEE; to gain weight, consume more.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, select gender and activity level. For accurate results, use morning measurements before eating.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculator?
A: It provides a good estimate for most people, but individual variations in metabolism may affect actual TDEE.

Q2: Should I eat my TDEE calories to maintain weight?
A: Yes, consuming your TDEE calories should maintain your current weight, assuming accurate activity level assessment.

Q3: How often should I recalculate my TDEE?
A: Recalculate whenever your weight changes significantly (±5kg) or your activity level changes substantially.

Q4: Why use kg and cm instead of pounds and inches?
A: This calculator uses metric units as it's the standard in the UK and most scientific equations use metric measurements.

Q5: Can TDEE change day to day?
A: Yes, TDEE varies with activity levels. This calculator gives an average estimate based on your typical activity.