1. What Is Average Calories Burned in a Day?

The average calories burned in a day is the sum of your Basal Metabolic Rate (BMR) and calories burned through physical activity. BMR represents the calories your body needs at complete rest, while activity calories depend on your exercise level.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor Equation for BMR and activity multipliers:

Where:

• \( \text{BMR} \) — Calculated differently for men and women
• \( \text{Activity Calories} \) — BMR multiplied by activity factor minus BMR

BMR Formulas:
Men: \( (10 \times \text{weight}) + (6.25 \times \text{height}) - (5 \times \text{age}) + 5 \)
Women: \( (10 \times \text{weight}) + (6.25 \times \text{height}) - (5 \times \text{age}) - 161 \)

3. Importance of Calorie Calculation

Details: Knowing your daily calorie expenditure helps with weight management, fitness planning, and nutritional requirements.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, select gender and activity level. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor instead of Harris-Benedict?
A: The Mifflin-St Jeor equation is considered more accurate for most people in modern times.

Q2: What are typical BMR values?
A: Average BMR is about 1500-2000 kcal/day for men and 1400-1700 kcal/day for women.

Q3: How accurate are activity multipliers?
A: They provide estimates. Actual calories burned may vary based on exercise intensity and individual metabolism.

Q4: Should I eat my BMR or total calories?
A: For weight maintenance, eat total calories. For weight loss, create a deficit from total calories, not below BMR.

Q5: Does muscle mass affect BMR?
A: Yes, muscle burns more calories at rest than fat. Those with more muscle mass may have higher BMR.