Calorie Deficit & Weight Loss Calculator
Calculate daily maintenance calories (TDEE) and healthy calorie deficit targets.
🥗 Body & Activity Metrics
🎯 Daily Calorie Targets
About Calorie Deficit & TDEE Weight Loss Calculator
Determine your daily energy expenditure and ideal calorie intake for safe, sustainable fat loss with our Calorie Deficit Calculator. Based on the scientifically validated Mifflin-St Jeor Basal Metabolic Rate (BMR) equation and Total Daily Energy Expenditure (TDEE), this tool calculates customized daily calorie targets for mild, moderate, and aggressive weight loss.
Key Nutrition Calculation Features
- 🔬 Mifflin-St Jeor Formula: The gold standard clinical formula for calculating Basal Metabolic Rate (BMR).
- 🏃 TDEE Activity Multipliers: Accounts for Sedentary, Light Exercise, Moderate, Active, and Very Active lifestyles.
- ⚖️ Tiered Weight Loss Targets: Mild (0.25 kg/week, -250 kcal), Moderate (0.5 kg/week, -500 kcal), and Accelerated (1 kg/week, -1000 kcal).
- 🍏 Macro & Safety Warnings: Protects against dangerously low calorie intake below essential metabolic minimums.
How Calorie Deficits Work for Fat Loss
- 1 pound of body fat is roughly equivalent to 3,500 calories (or ~7,700 calories per 1 kg of fat).
- A daily calorie deficit of 500 kcal results in approximately 1 lb (0.45 kg) of fat loss per week.
- A daily calorie deficit of 1,000 kcal results in approximately 2 lbs (0.9 kg) of fat loss per week.
- Maintain high dietary protein intake (1.6-2.2g per kg) to preserve lean muscle tissue during a deficit.
Frequently Asked Questions (FAQ)
What is a calorie deficit?
A calorie deficit occurs when you consume fewer calories through food and drinks than your body burns through basal metabolism and physical activity.
What is a safe calorie deficit for healthy weight loss?
A moderate deficit of 300 to 500 calories below your TDEE is widely recommended by nutritionists for sustainable, healthy fat loss without metabolic slowdown.
What is the difference between BMR and TDEE?
BMR is the baseline calories burned at complete rest to keep organs functioning. TDEE is your Total Daily Energy Expenditure including exercise and daily movement.
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