Daily Calories Formula:
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The Body Weight Calculator For Weight Loss estimates your daily calorie needs for sustainable weight loss based on your Basal Metabolic Rate (BMR) and activity level, creating a 500-calorie deficit for gradual weight reduction.
The calculator uses the following formula:
Where:
Explanation: This equation calculates your maintenance calories (BMR × Activity) and subtracts 500 calories to create a deficit for steady weight loss.
Details: Accurate calorie calculation is essential for sustainable weight loss, preventing muscle loss, maintaining energy levels, and ensuring proper nutrition while creating a controlled calorie deficit.
Tips: Enter your calculated BMR value, select your activity level from the dropdown menu. All values must be valid (BMR > 0).
Q1: What is BMR and how do I calculate it?
A: BMR (Basal Metabolic Rate) is the number of calories your body needs at complete rest. Use separate BMR calculators that consider age, gender, height, and weight.
Q2: Why subtract 500 calories specifically?
A: A 500-calorie daily deficit typically results in about 0.5 kg (1 lb) of weight loss per week, which is considered safe and sustainable.
Q3: Can I create a larger calorie deficit for faster weight loss?
A: While possible, deficits larger than 500-750 calories may lead to muscle loss, nutrient deficiencies, and metabolic adaptation that slows weight loss.
Q4: How often should I recalculate my calorie needs?
A: Recalculate every 4-6 weeks or after significant weight loss (5+ kg) as your BMR decreases with weight loss.
Q5: Should I adjust my calories if I'm not losing weight?
A: If weight loss stalls for 2-3 weeks, you may need to recalculate your BMR and adjust your calorie intake, as metabolic rate decreases with weight loss.