Calorie Calculator to Lose Weight in 3 Months for Women

Weight Loss Calorie Formula:

\[ Calories = (10 \times weight + 6.25 \times height - 5 \times age - 161) \times activity\_factor - (weight\_loss\_kg \times 7700 / 90) \]

Weight:

Height:

Age:

years

Activity Factor:

Desired Weight Loss:

Recommended Daily Calories:

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1. What is the Weight Loss Calorie Formula?

This calculator estimates the daily calorie intake needed for women to lose a specific amount of weight in 3 months, based on the Mifflin-St Jeor equation adjusted for activity level and weight loss goals.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ Calories = (10 \times weight + 6.25 \times height - 5 \times age - 161) \times activity\_factor - (weight\_loss\_kg \times 7700 / 90) \]

Where:

\( weight \) — Body weight in kilograms
\( height \) — Height in centimeters
\( age \) — Age in years
\( activity\_factor \) — Multiplier based on activity level
\( weight\_loss\_kg \) — Desired weight loss in kilograms
7700 — Calories per kilogram of body fat
90 — Days in 3 months

Explanation: The equation first calculates Basal Metabolic Rate (BMR), then adjusts for activity level (TDEE), and finally subtracts the calorie deficit needed for the desired weight loss over 3 months.

3. Importance of Calorie Calculation

Details: Accurate calorie calculation is crucial for safe and effective weight loss. Too aggressive a deficit can lead to muscle loss and metabolic slowdown, while too small may not produce results.

4. Using the Calculator

Tips: Enter your current weight in kg, height in cm, age in years, select your activity level, and desired weight loss in kg. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is this calculator specific to women?
A: The formula uses different constants for women (-161) than men (+5) due to differences in body composition and metabolism.

Q2: How accurate is the 7700 kcal/kg figure?
A: This is an estimate; actual fat loss may vary based on individual metabolism and body composition changes.

Q3: Can I use this for more than 3 months?
A: Yes, but recalculate periodically as your weight changes to maintain an appropriate deficit.

Q4: What if I want to lose weight faster?
A: It's generally recommended not to exceed a 1kg/week loss (about 1000 kcal/day deficit) without medical supervision.

Q5: Should I adjust my calories as I lose weight?
A: Yes, recalculate every 4-6 weeks or after significant weight changes (5+ kg) for best results.