You've typed "how many calories should I eat" into Google and gotten 47 different answers. Here's the one that actually matters — and it's backed by the most validated formula in nutrition science.
The Mifflin-St Jeor Equation: The Gold Standard
In 1990, Dr. Mifflin and Dr. St Jeor published a formula that's since been validated as the most accurate BMR calculator for the general population (better than Harris-Benedict and WHO formulas).
The Formula
Men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
Women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161
📊 BMR Examples
| Profile | Weight | Height | Age | BMR (kcal/day) | |---------|--------|--------|-----|----------------| | Indian male, desk job | 70 kg | 170 cm | 28 | 1,640 | | Indian female, desk job | 58 kg | 160 cm | 25 | 1,326 | | Active male, gym 5x/week | 75 kg | 175 cm | 30 | 1,719 | | Active female, runner | 60 kg | 165 cm | 27 | 1,394 |
Your BMR is what you'd burn in a coma — just keeping your organs running. You need more calories than this to live a normal life.
From BMR to TDEE: The Activity Multiplier
Multiply your BMR by your activity level to get Total Daily Energy Expenditure (TDEE):
| Activity Level | Multiplier | Description | Example (70kg male) | |---------------|------------|-------------|---------------------| | Sedentary | ×1.2 | Desk job, no exercise | 1,968 kcal | | Light | ×1.375 | 1-3 days/week exercise | 2,255 kcal | | Moderate | ×1.55 | 3-5 days/week exercise | 2,542 kcal | | Active | ×1.725 | 6-7 days/week exercise | 2,829 kcal | | Very Active | ×1.9 | Athlete/manual labor | 3,116 kcal |
The Trench Truth: Most people overestimate their activity level. If you have a desk job and go to the gym 3 times a week, you're "light" — not "moderate." The gym is 3 hours out of 168. The other 165 hours, you're sitting. Be honest with the multiplier or you'll overeat.
Calorie Targets by Goal
📊 The ±500 Rule
| Goal | Adjustment | Weekly Change | Monthly Change | |------|-----------|---------------|----------------| | Lose weight | TDEE − 500 kcal | −0.5 kg | −2 kg | | Maintain | TDEE (no change) | 0 | 0 | | Gain muscle | TDEE + 400 kcal | +0.35 kg | +1.5 kg |
Full Example: 70kg Indian Male, Desk Job, Wants to Lose Weight
| Step | Calculation | Result | |------|-----------|--------| | BMR | 10×70 + 6.25×170 − 5×28 + 5 | 1,640 kcal | | TDEE (sedentary) | 1,640 × 1.2 | 1,968 kcal | | Weight loss target | 1,968 − 500 | 1,468 kcal/day |
Never go below 1,200 kcal/day (women) or 1,500 kcal/day (men) without medical supervision. Below these thresholds, you risk muscle loss, nutrient deficiencies, and metabolic slowdown.
Macro Breakdown: Where Your Calories Come From
Calories aren't just a number — the source matters.
📊 Macro Split by Goal
| Macro | Weight Loss | Maintenance | Muscle Gain | |-------|------------|-------------|-------------| | Protein | 35% (129g) | 25% (92g) | 30% (132g) | | Carbs | 40% (147g) | 50% (246g) | 45% (231g) | | Fat | 25% (41g) | 25% (55g) | 25% (55g) |
Based on 1,468 kcal (loss), 2,200 kcal (maintain), 2,600 kcal (gain)
Why Protein Matters More Than You Think
| Fact | Number | |------|--------| | RDA protein (India) | 0.8g/kg → 56g for 70kg person | | Recommended for active Indians | 1.2-1.6g/kg → 84-112g | | For muscle gain | 1.6-2.2g/kg → 112-154g | | Average Indian intake | 40-50g/day (deficient) |
The Trench Truth: The average Indian diet is protein-deficient. A typical dal-roti-sabzi meal provides maybe 15-20g protein. You need 80-110g. The gap isn't small — it's 40-60g/day. Adding 2 eggs (12g), 1 cup curd (9g), and 100g paneer/chicken (18-25g) closes most of it.
Indian Diet: Calorie Reality Check
📊 Common Indian Meals — Calorie & Protein Content
| Meal | Calories | Protein | Carbs | Fat | |------|---------|---------|-------|-----| | 2 roti + dal + sabzi | 450 kcal | 14g | 60g | 14g | | 1 plate biryani (chicken) | 650 kcal | 28g | 75g | 22g | | 1 masala dosa + chutney | 350 kcal | 8g | 48g | 12g | | 1 plate chole bhature | 700 kcal | 18g | 82g | 28g | | 1 bowl curd rice | 280 kcal | 8g | 42g | 8g | | 2 eggs + 2 toast | 320 kcal | 18g | 28g | 16g | | 100g paneer tikka | 260 kcal | 18g | 6g | 20g | | 1 cup chai + 2 biscuits | 150 kcal | 2g | 22g | 5g |
📊 Sample 1,500 kcal Indian Diet Plan
| Meal | Food | Calories | Protein | |------|------|---------|---------| | Breakfast | 2 eggs + 2 multigrain toast + chai (no sugar) | 320 | 18g | | Snack | 1 apple + 10 almonds | 160 | 4g | | Lunch | 2 roti + dal + paneer sabzi + salad | 450 | 22g | | Snack | Curd (1 cup) + 1 banana | 220 | 9g | | Dinner | 1 roti + chicken curry + sabzi | 350 | 25g | | Total | | 1,500 kcal | 78g |
The Weight Loss Plateau: Why It Happens
As you lose weight, your TDEE drops. A 70kg person at sedentary burns 1,968 kcal. At 60kg, they burn only 1,740 kcal. The 500-calorie deficit that was working at 70kg becomes only a 272-calorie deficit at 60kg.
Solution: Recalculate your TDEE every 5 kg of weight loss.
Calculate Your Own Calories
Use our Calorie Calculator to:
- Get your BMR and TDEE using the Mifflin-St Jeor equation
- See personalized calorie targets for weight loss, maintenance, or gain
- Get macro breakdown with protein, carb, and fat targets
- Track your progress over time
Key Takeaways
- The Mifflin-St Jeor equation is the most validated BMR formula — more accurate than Harris-Benedict
- Most people overestimate their activity level — desk job + gym 3x/week = "light," not "moderate"
- 500 kcal/day deficit = ~0.5 kg/week loss; never go below 1,200 (women) or 1,500 (men) kcal
- The average Indian diet provides only 40-50g protein/day — you need 80-110g
- Recalculate TDEE every 5 kg to avoid weight loss plateaus
- Calculate your exact calorie needs with our Calorie Calculator
Sources: Mifflin MD, St Jeor ST et al. (1990) "A new predictive equation for resting metabolic rate," American Journal of Clinical Nutrition; ICMR Dietary Guidelines for Indians (2020); Academy of Nutrition and Dietetics Position Papers.
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