1. What is Weight Loss Calculation?

The weight loss calculation estimates how much body weight you can lose based on your daily caloric deficit, time period, and age. It accounts for the fact that metabolism slows with age.

2. How Does the Calculator Work?

The calculator uses the weight loss equation:

Where:

• \( \text{deficit} \) — Daily calorie deficit (intake minus expenditure)
• \( \text{days} \) — Duration of deficit in days
• \( 7700 \) — Approximate calories in 1 kg of body fat

Age Adjustment: The calculator reduces the effective deficit by 2% per decade after age 20 to account for metabolic slowing.

3. Importance of Age Adjustment

Details: Basal metabolic rate typically declines about 1-2% per decade after age 20. This calculator accounts for this natural slowing to provide more realistic weight loss projections.

4. Using the Calculator

Tips: Enter your planned daily calorie deficit (typically 300-1000 kcal/day), the number of days you'll maintain this deficit, and your current age. All values must be valid (deficit > 0, days ≥1, age ≥18).

5. Frequently Asked Questions (FAQ)

Q1: Why 7700 kcal/kg?
A: This is the approximate energy content of 1 kg of body fat, though individual variation exists.

Q2: How accurate is this calculation?
A: It provides a reasonable estimate but individual results vary based on body composition, activity changes, and metabolic adaptation.

Q3: Why adjust for age?
A: Metabolism naturally slows with age due to loss of muscle mass and hormonal changes, making weight loss more challenging.

Q4: What's a safe calorie deficit?
A: Generally 300-1000 kcal/day is safe. Very large deficits can cause muscle loss and metabolic slowdown.

Q5: Does this account for plateaus?
A: No, the calculation assumes linear weight loss. In reality, weight loss often slows over time due to metabolic adaptation.