Every successful weight loss plan — whether keto, intermittent fasting, low-carb, or traditional Indian diet — works through one mechanism: a calorie deficit. Understanding this principle lets you lose fat sustainably without following extreme or unsustainable diets.
A calorie deficit occurs when you consume fewer calories than your body burns. Your body then uses stored fat as fuel to make up the difference, resulting in fat loss over time.
The basic rule: 1 kg of body fat contains roughly 7,700 calories. To lose 1 kg of fat, you need a total deficit of ~7,700 calories over time.
| Daily Deficit | Weekly Deficit | Monthly Fat Loss |
|---|---|---|
| 250 kcal/day | 1,750 kcal | ~0.9 kg |
| 500 kcal/day | 3,500 kcal | ~2 kg |
| 750 kcal/day | 5,250 kcal | ~3 kg |
Note: Real-world weight loss includes water and muscle changes. Actual fat loss is what the numbers represent.
Your TDEE is how many calories your body burns in a typical day. Use the Mifflin-St Jeor formula:
Men: (10 × kg) + (6.25 × cm) − (5 × age) + 5, then multiply by activity factor
Women: (10 × kg) + (6.25 × cm) − (5 × age) − 161, then multiply by activity factor
Activity factors: Sedentary = ×1.2 | Lightly active = ×1.375 | Moderately active = ×1.55
| Goal | Deficit | Best for |
|---|---|---|
| Sustainable fat loss | TDEE − 300 to 500 | Most people; preserves muscle, manageable hunger |
| Faster fat loss | TDEE − 500 to 750 | Significant overweight; higher motivation for speed |
| Aggressive (short-term) | TDEE − 750 to 1000 | Under medical supervision only; high muscle loss risk |
Warning: Never go below 1,200 calories/day (women) or 1,500 calories/day (men). Extreme restriction causes muscle loss, nutrient deficiencies, hormonal disruption, and usually leads to binge-rebound cycles.
This is a 1,600 kcal plan suitable for a sedentary to lightly active Indian woman (~65kg, TDEE ~2,000). Adjust portions for your numbers.
Total: ~1,600 kcal | Protein: ~80g | Deficit: ~400 kcal/day | Expected loss: ~1.5–2 kg/month
| Food | Portion | Calories | Comment |
|---|---|---|---|
| White rice (cooked) | 1 cup (200g) | 260 | Easy to overeat |
| Roti (whole wheat) | 1 medium | 80–100 | Better than maida |
| Dal (cooked) | 1 cup | 150–200 | High protein, filling |
| Ghee | 1 tsp (5g) | 45 | Adds up fast |
| Samosa (fried) | 1 piece | 250–300 | Hidden calories |
| Biryani (chicken) | 1 plate | 500–700 | Restaurant portions huge |
| Mithai (ladoo) | 1 piece | 150–250 | Festival danger zone |
| Chai with milk+sugar | 1 cup | 60–100 | 4 cups/day = 400 kcal |
| Masala dosa | 1 piece | 250–350 | Depends on oil used |
Four likely causes: (1) Underestimating food intake — start weighing portions; (2) Metabolic adaptation after prolonged dieting — take a 1–2 week diet break at TDEE; (3) Water retention from high sodium, new exercise, or hormonal shifts; (4) Medical causes like hypothyroidism — worth checking if everything else is ruled out.
Both work because both create a calorie deficit. IF restricts the eating window, making it easier to eat less without counting. Calorie counting is more precise. Pick the one you will actually stick to for 3+ months — consistency beats method.
0.5–1 kg per week (2–4 kg per month) is the standard recommendation for sustainable fat loss with minimal muscle loss. Faster is possible but increases the risk of muscle loss and rebound weight gain.
Also see: BMR Calculator | TDEE Guide | Indian Food Calorie Guide