Weight Loss Formula:
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A calorie deficit occurs when you consume fewer calories than your body expends. This is the fundamental principle behind weight loss, as your body taps into stored energy (fat) to make up the difference.
The calculator uses the simple formula:
Where:
Explanation: By subtracting your desired deficit from your TDEE, you get the daily calorie target for weight loss.
Details: Creating an appropriate calorie deficit is crucial for sustainable weight loss. Too large a deficit can lead to muscle loss and metabolic slowdown, while too small may not produce results.
Tips: Enter your TDEE (calculate separately if unknown) and your desired daily calorie deficit. A typical deficit ranges from 300-1000 kcal/day depending on goals and starting weight.
Q1: What's a safe calorie deficit?
A: Generally 300-500 kcal/day for modest weight loss (0.5-1 lb/week) or 500-1000 kcal/day for more aggressive loss (1-2 lb/week).
Q2: How do I calculate my TDEE?
A: TDEE calculators consider your BMR (basal metabolic rate) multiplied by activity level factors.
Q3: Can I create a deficit through exercise alone?
A: Yes, but combining diet and exercise is most effective. Exercise calories are often overestimated.
Q4: Why am I not losing weight with a deficit?
A: Common reasons include inaccurate tracking, metabolic adaptation, water retention, or underestimating intake.
Q5: Is a very large deficit better?
A: No, deficits >1000 kcal/day can lead to muscle loss, nutrient deficiencies, and metabolic slowdown.