1. What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions at rest. It represents the minimum energy required to keep your body functioning, including breathing, circulation, and cell production.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

Where:

• \( Weight \) — Body weight in kilograms (kg)
• \( Height \) — Height in centimeters (cm)
• \( Age \) — Age in years
• 5 — Constant for men
• -161 — Constant for women

TDEE Calculation: Total Daily Energy Expenditure is calculated by multiplying BMR by an activity factor that represents your exercise level.

3. Importance of BMR Calculation

Details: Knowing your BMR helps in creating effective weight management plans, whether for weight loss, maintenance, or gain. It provides a baseline for determining your daily caloric needs.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between BMR and TDEE?
A: BMR is the calories burned at complete rest, while TDEE includes all daily activities and exercise.

Q2: How accurate is this BMR calculation?
A: The Mifflin-St Jeor equation is considered one of the most accurate formulas for estimating BMR in healthy adults.

Q3: Should I use BMR or TDEE for weight loss?
A: For weight loss, use TDEE as your starting point and create a calorie deficit from that number.

Q4: How often should I recalculate my BMR?
A: Recalculate whenever your weight changes significantly (5+ kg) or every 3-6 months.

Q5: Can muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue, so individuals with more muscle mass typically have higher BMR.