1. What is the TDEE Gain Equation?

The TDEE Gain equation calculates the total daily energy expenditure required to gain weight by adding a 500 kcal surplus to your baseline TDEE. This creates a caloric surplus that supports weight gain at a healthy rate of about 0.5 kg per week.

2. How Does the Calculator Work?

The calculator uses the TDEE Gain equation:

Where:

• \( TDEE \) — Total Daily Energy Expenditure (kcal/day)
• 500 — Caloric surplus for weight gain (kcal/day)

Explanation: The equation adds a 500 kcal surplus to your maintenance calories to create the energy surplus needed for consistent weight gain.

3. Importance of TDEE Gain Calculation

Details: Calculating the appropriate caloric surplus is crucial for healthy weight gain, ensuring you consume enough calories to build muscle mass without excessive fat accumulation.

4. Using the Calculator

Tips: Enter your calculated TDEE in kcal/day. The value must be valid (TDEE > 0). The calculator will add 500 kcal to determine your weight gain calorie target.

5. Frequently Asked Questions (FAQ)

Q1: Why add 500 calories for weight gain?
A: A 500 kcal surplus typically results in about 0.5 kg (1 lb) of weight gain per week, which is considered a healthy and sustainable rate.

Q2: Should I adjust the surplus based on my goals?
A: Yes, individuals with faster metabolisms or those looking for more aggressive weight gain may need a larger surplus, while others may prefer a smaller surplus.

Q3: What if I'm not gaining weight with 500 kcal surplus?
A: You may need to increase your surplus slightly. Individual metabolic rates and activity levels can vary, requiring adjustments to the standard 500 kcal surplus.

Q4: Is this suitable for muscle building?
A: Yes, a 500 kcal surplus provides adequate energy for muscle growth while minimizing fat gain when combined with proper strength training.

Q5: How often should I recalculate my TDEE gain?
A: Recalculate every 4-6 weeks or whenever your weight, activity level, or goals change significantly.