1. What is This Calorie Calculator?

This calculator estimates the daily calorie intake needed for weight loss in UK men, based on the Mifflin-St Jeor equation adjusted for a 500 kcal/day deficit for steady weight loss.

2. How Does the Calculator Work?

The calculator uses the equation:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• \( activity\_factor \) — Multiplier for physical activity level
• 500 — Calorie deficit for weight loss

Explanation: The equation calculates basal metabolic rate (BMR), adjusts for activity level, then subtracts 500 kcal to create a deficit for weight loss.

3. Importance of Calorie Calculation

Details: Accurate calorie estimation helps create an effective weight loss plan while maintaining adequate nutrition and energy levels.

4. Using the Calculator

Tips: Enter 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: Why subtract 500 calories?
A: A 500 kcal/day deficit typically results in about 0.5kg (1lb) of weight loss per week, considered a safe and sustainable rate.

Q2: What if I don't lose weight with these calories?
A: Metabolic rates vary - adjust your intake based on results. Consult a dietitian if needed.

Q3: Should I eat back exercise calories?
A: The activity factor already accounts for exercise - don't eat additional calories unless feeling fatigued.

Q4: Is this suitable for very overweight individuals?
A: Those with BMI >30 may need customized plans - consult a healthcare professional.

Q5: How often should I recalculate?
A: Reassess every 5-10kg of weight loss or if activity levels change significantly.