1. What is the MyFitnessPal Weight Loss Calculator?

The MyFitnessPal Weight Loss Calculator estimates your daily calorie needs for weight loss based on your Basal Metabolic Rate (BMR), activity level, and desired calorie deficit.

2. How Does the Calculator Work?

The calculator uses the equation:

Where:

• \( BMR \) — Basal Metabolic Rate (calories your body needs at rest)
• \( Activity\ Factor \) — Multiplier based on your activity level
• \( Deficit \) — Calorie reduction for weight loss (typically 500 kcal/day for 1 lb/week loss)

Explanation: The equation calculates your total daily energy expenditure (TDEE) then subtracts your desired deficit to create weight loss.

3. Importance of Calorie Calculation

Details: Accurate calorie calculation is crucial for sustainable weight loss while maintaining energy levels and muscle mass.

4. Using the Calculator

Tips: Enter your BMR (from a BMR calculator), select your activity level, and choose a deficit (typically 250-500 kcal/day for moderate weight loss).

5. Frequently Asked Questions (FAQ)

Q1: How do I determine my BMR?
A: Use a BMR calculator that considers your age, gender, height, and weight. The Mifflin-St Jeor equation is commonly used.

Q2: What activity factor should I choose?
A: Be honest about your daily activity. Sedentary means little to no exercise, while very active means hard exercise 6-7 days/week.

Q3: What's a safe calorie deficit?
A: 250-500 kcal/day for 0.5-1 lb/week loss is generally safe. Very low calorie diets (<1200 kcal for women, <1500 for men) require medical supervision.

Q4: Why am I not losing weight at this calorie level?
A: You may be underestimating intake or overestimating activity. Track carefully for 2-3 weeks before adjusting.

Q5: Should I adjust my calories as I lose weight?
A: Yes, recalculate every 10-15 lbs lost as your BMR decreases with weight loss.