Your daily calorie goal is below 1,200 kcal. Diets under 1,200 calories per day are generally not recommended without medical supervision, as it is difficult to meet nutritional needs.
Weekly Weight Loss
Monthly Weight Loss
Understanding Calorie Deficits
A calorie deficit occurs when you consistently consume fewer calories than you expend. It is the fundamental biological requirement for weight loss. Your body needs a certain amount of energy (calories) to function, maintain its temperature, and power your physical activities. When you supply less energy than it needs, it turns to stored energy—primarily body fat—to make up the difference.
Before calculating your deficit, you need to know your Total Daily Energy Expenditure (TDEE), which is your maintenance calories. You can use our BMR & TDEE Calculator to find this number.
Healthy Deficit Rates
While an aggressive deficit might seem like the fastest path to your goal, moderate and sustainable deficits are highly recommended to preserve muscle mass, maintain energy levels, and ensure long-term success.
- Small Deficit (10-15% or 250 kcal/day): Ideal for athletes, those looking to retain maximum muscle mass, or individuals within 5-10 lbs of their goal weight. Yields about 0.5 lb (0.25 kg) loss per week.
- Moderate Deficit (20-25% or 500 kcal/day): The gold standard for sustainable weight loss. Balances consistent progress with manageable hunger. Yields about 1 lb (0.5 kg) loss per week.
- Aggressive Deficit (25-30% or 750-1000 kcal/day): Best suited for individuals with significant body fat to lose. This rate often requires careful macro tracking to ensure adequate protein and nutrient intake. Yields about 1.5-2 lbs (0.75-1 kg) loss per week.
Safety Guidelines & The 1,200 Calorie Rule
It's crucial to prioritize your health while pursuing weight loss. Extreme deficits can lead to muscle loss, nutrient deficiencies, lowered immunity, and a slowed metabolism due to metabolic adaptation.
As a general medical guideline, women should not consume less than 1,200 calories per day, and men should not consume less than 1,500 calories per day without medical supervision. If your calculated deficit pushes your daily intake below these numbers, we strongly recommend reducing your deficit and increasing your daily activity to burn more calories instead of eating less.