1. What Is The BMR Calculator?

The BMR (Basal Metabolic Rate) Calculator estimates the number of calories your body needs to perform basic life-sustaining functions at rest. It represents the minimum energy required to maintain vital functions like breathing, circulation, and cell production.

2. How Does The Calculator Work?

The calculator uses the Mifflin-St Jeor equations:

Where:

• weight — Body weight in kilograms (kg)
• height — Height in centimeters (cm)
• age — Age in years
• +5 — Additional calories for men
• -161 — Reduced calories for women

Explanation: These equations account for the fundamental differences in metabolic rates between genders and the natural decline in metabolism with age.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for weight management, creating effective diet plans, and understanding your body's energy requirements. It serves as the foundation for calculating total daily energy expenditure (TDEE).

4. Using The Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your gender. All values must be valid (weight > 0, height > 0, age between 1-120). For accurate results, use recent measurements.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and RMR?
A: BMR (Basal Metabolic Rate) measures energy expenditure at complete rest, while RMR (Resting Metabolic Rate) measures energy expenditure at rest but may include minimal activity. BMR is typically slightly lower than RMR.

Q2: How often does BMR change?
A: BMR changes with body composition, age, and weight fluctuations. Significant weight loss or gain, aging, and changes in muscle mass can affect your BMR.

Q3: Can I increase my BMR?
A: Yes, through regular exercise (especially strength training), building muscle mass, and maintaining proper nutrition. Muscle tissue burns more calories at rest than fat tissue.

Q4: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate BMR prediction equations for healthy adults, with an accuracy of about ±10% for most populations.

Q5: Should I use BMR for weight loss planning?
A: Yes, BMR is the starting point for calculating your total daily energy needs. To lose weight, create a calorie deficit based on your TDEE (BMR × activity level).