1. What is the James Smith TDEE Equation?

The James Smith TDEE equation calculates Total Daily Energy Expenditure based on weight, height, age, and activity level. It provides an estimate of the number of calories your body burns daily, helping with weight management and nutritional planning.

2. How Does the Calculator Work?

The calculator uses the TDEE equation:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in centimeters (cm)
• \( age \) — Age in years
• \( activity\_factor \) — Multiplier based on activity level

Activity Factors:

• Sedentary (little to 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 creating effective diet plans, whether your goal is weight loss, weight maintenance, or muscle gain. It helps determine appropriate calorie intake for your specific needs and activity level.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your activity level. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What is TDEE and why is it important?
A: TDEE (Total Daily Energy Expenditure) represents the total number of calories your body burns in a day. It's important for creating personalized nutrition plans and achieving weight management goals.

Q2: How accurate is this TDEE calculation?
A: While this equation provides a good estimate, individual variations in metabolism, body composition, and other factors mean it should be used as a starting point and adjusted based on results.

Q3: Should I use my current weight or goal weight?
A: Always use your current weight for the most accurate TDEE calculation. Adjust your calorie intake based on your goals while monitoring progress.

Q4: How often should I recalculate my TDEE?
A: Recalculate whenever your weight changes significantly (5+ kg) or your activity level changes substantially. Otherwise, recalculating every 1-2 months is sufficient.

Q5: Can this calculator be used for weight loss?
A: Yes, subtract 500-1000 calories from your TDEE to create a calorie deficit for weight loss. A deficit of 500 calories/day typically results in about 0.5 kg weight loss per week.