Calorie Deficit Calculator

Calorie Deficit Calculator is the fundamental tool for scientific weight loss. The law of thermodynamics states: to lose weight, you must consume fewer calories than you burn.\n\nThis tool calculates your TDEE (Total Daily Energy Expenditure) and subtracts a specific percentage (usually 15-25%) to provide a daily calorie target. It turns the vague goal of "eating less" into a precise number (e.g., "Eat 1,850 kcal/day").

1. Weight Loss Seekers: Anyone trying to shed body fat efficiently. 2. Bodybuilders: During a "cutting" phase to reveal muscle definition. 3. Health Conscious: To understand their maintenance calories.

1. 3500 Calorie Rule: Mathematically, 1 lb of fat is approx 3,500 kcal. To lose 1 lb per week, you need a deficit of 500 kcal/day. 2. Activity Level: Be honest. Overestimating exercise is the #1 reason calculators fail. Most office workers are "Sedentary" even if they exercise 3 times a week. 3. Protein: In a deficit, high protein intake (1.6-2.2g per kg) is crucial to prevent muscle loss.

Mild Deficit (10-15%): Slow, sustainable weight loss. Good for performance. Moderate Deficit (20-25%): The sweet spot. noticeable results without starving. Aggressive Deficit (>25%): Fast results but high risk of muscle loss, fatigue, and binge eating. Not recommended for long term.

1. Track Everything: Use a food scale and app (MyFitnessPal) to hit your target number. 2. Prioritize Volume: Eat high-volume, low-calorie foods (vegetables) to feel full. 3. Don't Drink Calories: Switch soda/juice to water or diet versions. 4. Re-calculate: As you lose weight, your TDEE drops. Recalculate every 5-10 lbs.