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BMR Equation for Females (NHS):
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Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions while at complete rest. It represents the minimum energy required to maintain vital functions like breathing, circulation, and cell production.
The calculator uses the NHS BMR equation for females:
Where:
Explanation: This equation calculates the baseline calories needed for basic bodily functions, which forms the foundation for determining daily calorie needs for weight loss.
Details: Knowing your BMR is essential for creating an effective weight loss plan. It helps determine your Total Daily Energy Expenditure (TDEE) when combined with activity level, allowing you to create a calorie deficit for safe and sustainable weight loss as recommended by the NHS.
Tips: Enter your current weight in kilograms, height in centimeters, and age in years. All values must be valid (weight > 0, height > 0, age between 1-120). For accurate results, use precise measurements.
Q1: How accurate is this BMR calculation?
A: This formula provides a good estimate for most women. However, individual variations in muscle mass, body composition, and metabolism can affect actual BMR.
Q2: How do I use BMR for weight loss?
A: Multiply your BMR by your activity level factor to get TDEE, then create a calorie deficit of 500-1000 calories per day for safe weight loss of 0.5-1kg per week.
Q3: Does BMR change with weight loss?
A: Yes, as you lose weight, your BMR decreases because your body requires less energy to maintain a smaller body mass.
Q4: When should I recalculate my BMR?
A: Recalculate every 4-6 weeks during weight loss, or whenever you experience significant weight changes (±5kg).
Q5: Are there factors that can affect BMR accuracy?
A: Yes, factors like thyroid function, pregnancy, menopause, medications, and extreme dieting can affect your actual metabolic rate.