Calorie Deficit Planner
Plan a safe, sustainable calorie deficit to reach your goal weight. Includes timeline milestones and a 1,200 kcal safety floor.
How the Calorie Deficit is Calculated
The calculator uses the 7,700 kcal per kg of fat rule — the widely accepted approximation that losing 1 kg of body fat requires a total energy deficit of approximately 7,700 kcal. To lose 5 kg, you need a cumulative deficit of 38,500 kcal spread across your chosen timeframe.
For example, a 500 kcal/day deficit over 77 days (about 11 weeks) would result in approximately 5 kg of fat loss, assuming your weight loss is primarily from fat and not lean muscle mass.
Don't know your maintenance calories? Use the Macro Calculator to find your TDEE
Safe vs Aggressive Deficits
Not all calorie deficits are equal. The size of your deficit significantly affects how much muscle you preserve and how sustainable the process is:
- Mild deficit (200-300 kcal/day) - Very sustainable. Minimal risk of muscle loss. Ideal for people who are already lean or want to cut slowly. Weight loss: approximately 0.2-0.3 kg per week.
- Moderate deficit (300-500 kcal/day) - The recommended range. Fast enough to see progress, slow enough to preserve muscle. Weight loss: approximately 0.3-0.5 kg per week.
- Aggressive deficit (500-750 kcal/day) - Acceptable for short periods if protein intake is high at 1.8-2.2g per kg. Requires careful planning. Weight loss: approximately 0.5-0.75 kg per week.
- Crash diet (over 750 kcal/day deficit) - High risk of muscle loss, nutrient deficiency, fatigue, and rebound weight gain. Not recommended.
Indian Diet Tips for a Sustainable Calorie Deficit
Cutting calories on an Indian diet does not mean giving up roti or rice. It means being strategic about portions and high-calorie cooking methods:
- Watch the oil and ghee - Each extra teaspoon of ghee or oil adds 40-45 kcal. Indian cooking often uses more oil than people realise. Switching from deep-frying to air-frying or using a non-stick pan can reduce 150-300 kcal per meal.
- Prioritise protein with every meal - Dal, paneer, eggs, curd, and sprouts are your best tools. Higher protein intake preserves muscle during a deficit and keeps hunger low.
- Do not cut carbs drastically - Reducing roti and rice too aggressively makes the diet unsustainable. A moderate reduction combined with more vegetables and dal is more effective long-term.
- Stay above 1,200 kcal per day - Our calculator enforces this safety floor. Below this level, it becomes very difficult to meet nutritional needs, especially on a vegetarian diet.
Frequently Asked Questions
How accurate is the 7,700 kcal per kg rule?
It is a useful approximation, not an exact science. In reality, actual weight loss depends on metabolic adaptation, water retention, fibre intake, and how much of your deficit comes from fat versus lean tissue. Real-world results typically differ by 10-20% from the calculation. Use this tool for planning and directional guidance, not to the decimal.
Why does my weight loss slow down after the first few weeks?
This is called metabolic adaptation. As you lose weight, your TDEE decreases because you weigh less. Additionally, your body may reduce non-exercise activity in response to a calorie deficit. After 6-8 weeks, recalculate your new TDEE using the Macro Calculator with your current weight.
Is it okay to eat more on some days and less on others?
Yes — what matters is your average deficit over the week, not day-by-day precision. Eating slightly more on weekends and less on weekdays is a valid approach called calorie cycling. The important thing is that your weekly total deficit stays consistent with your goal.
Can I lose weight without counting calories?
Yes, but it is harder. For those who prefer not to count, portion control strategies — using your palm as a guide, filling half the plate with vegetables, avoiding second servings — can approximate a deficit. However, if weight is not moving after 3-4 weeks, tracking calories for even a short period can reveal where the problem lies.