1. What is BMR?

BMR (Basal Metabolic Rate) is the number of calories your body needs to maintain basic physiological 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 for women:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in centimeters (cm)
• \( age \) — Age in years

Explanation: This equation estimates the calories burned at complete rest based on your body composition.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for weight management as it helps determine your daily calorie needs. For weight loss, you typically need to consume fewer calories than your total daily energy expenditure (which includes BMR plus activity calories).

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, and age in years. All values must be valid (weight > 0, height > 0, age between 1-120). For accurate results, measure your weight and height without clothes in the morning.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this BMR calculation?
A: The Mifflin-St Jeor Equation is about 70% accurate for most people. For more precision, consider professional metabolic testing.

Q2: How can I use BMR for weight loss?
A: Subtract 300-500 calories from your total daily energy expenditure (BMR × activity factor) for gradual, sustainable weight loss.

Q3: Does BMR change over time?
A: Yes, BMR decreases with age (about 1-2% per decade) and with weight loss, as smaller bodies require fewer calories.

Q4: What factors affect BMR?
A: Muscle mass, body size, age, genetics, hormones, and environmental temperature all influence BMR.

Q5: Should I eat below my BMR to lose weight?
A: Generally not recommended as it may slow metabolism. Instead, create a deficit through a combination of diet and exercise.