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Free Calorie Calculator — How Many Calories Do You Need Per Day?
Our free calorie calculator uses the scientifically validated Mifflin-St Jeor formula to estimate your daily calorie needs based on your age, gender, height, weight, and physical activity level. Whether your goal is weight loss, weight maintenance, or building muscle, this tool gives you personalised calorie and macro targets instantly.
What is BMR (Basal Metabolic Rate)?
Your Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest — simply to keep you alive. It represents the energy needed for fundamental functions like breathing, blood circulation, cell production, and maintaining body temperature. BMR accounts for approximately 60–75% of total daily energy expenditure.
Our calculator uses the Mifflin-St Jeor equation to calculate BMR:
| Gender | Mifflin-St Jeor Formula |
|---|---|
| Men | BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age(years) + 5 |
| Women | BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age(years) − 161 |
The Mifflin-St Jeor formula was published in 1990 and is consistently found to be the most accurate formula for estimating BMR in validation studies, outperforming the older Harris-Benedict equation (published in 1919). Research published in the Journal of the American Dietetic Association found Mifflin-St Jeor to be accurate within 10% for 82% of healthy adults.
What is TDEE (Total Daily Energy Expenditure)?
TDEE is your total daily calorie burn, including all physical activity. It is calculated by multiplying your BMR by an activity factor:
| Activity Level | Multiplier | Description | Examples |
|---|---|---|---|
| Sedentary | ×1.2 | Little or no exercise | Desk job, no workout |
| Lightly Active | ×1.375 | Light exercise 1–3 days/week | Evening walks, light yoga |
| Moderately Active | ×1.55 | Moderate exercise 3–5 days/week | Gym 4x/week |
| Very Active | ×1.725 | Hard exercise 6–7 days/week | Athlete, daily intense training |
| Extra Active | ×1.9 | Physical job + training | Construction worker + gym |
Your TDEE equals your maintenance calories — the amount you need to eat to maintain your current weight. Eating below TDEE causes weight loss; eating above causes weight gain.
How Many Calories to Eat for Weight Loss?
To lose weight, you need to create a calorie deficit — consuming fewer calories than your body burns. The recommended approach:
- Moderate deficit (–300 to –500 kcal/day): Results in 0.3–0.5 kg weight loss per week. This is sustainable and preserves muscle mass. Our calculator uses –500 kcal from TDEE as the weight loss target.
- Aggressive deficit (–500 to –750 kcal/day): Faster results (0.5–0.75 kg/week) but harder to maintain and may cause muscle loss and nutritional deficiencies.
- Very low calorie (<1200 kcal for women, <1500 kcal for men): Not recommended without medical supervision. Increases risk of nutrient deficiency and metabolic slowdown.
Key principle: 1 kg of fat ≈ 7700 calories. To lose 1 kg in a week, you would need a 7700 calorie deficit across 7 days (1100 kcal/day deficit). This is generally too aggressive. Instead, aim for 0.5 kg/week with a 500 kcal/day deficit — safer and more sustainable over months.
How Many Calories for Muscle Gain?
Building muscle (hypertrophy) requires both sufficient protein and a slight calorie surplus. Our calculator recommends +250 kcal above TDEE for muscle gain, which is known as a "lean bulk" approach:
- Lean Bulk (+200 to +300 kcal/day): Slow muscle gain with minimal fat gain. Recommended for most natural athletes. Gain approximately 0.5–1 kg lean mass per month.
- Traditional Bulk (+500 kcal/day): Faster muscle gain but significant fat accumulation. Requires a "cut" phase afterward to remove excess fat.
Remember that calorie surplus alone is not enough for muscle growth — progressive resistance training (increasing weights over time) is essential. Without adequate stimulus from training, excess calories will be stored primarily as fat.
Understanding Macronutrients
Macronutrients (macros) are the three main categories of nutrients that provide energy: protein, carbohydrates, and fat. Our calculator provides a recommended macro split for maintenance calories:
| Macronutrient | Calories per gram | Recommended % | Primary Functions |
|---|---|---|---|
| Protein | 4 kcal/g | 30% of calories | Muscle repair and growth, satiety, immune function |
| Carbohydrates | 4 kcal/g | 50% of calories | Primary energy source, brain function, training performance |
| Fat | 9 kcal/g | 20% of calories | Hormone production, vitamin absorption, cell health |
Protein Recommendations for Indians
Most Indians do not consume enough protein. ICMR recommends 0.8–1.0 g protein per kg body weight for sedentary adults, increasing to 1.4–2.0 g/kg for those doing regular exercise or strength training. Good protein sources in Indian diet include dal, rajma, chana, paneer, curd, eggs, chicken, fish, and soy products.
Calorie Needs by Age and Gender — India
| Age Group | Men (kcal/day) | Women (kcal/day) | Notes |
|---|---|---|---|
| 15–18 years | 2200–2800 | 1800–2200 | Higher needs for growth and development |
| 19–30 years | 2000–2600 | 1600–2100 | Peak metabolic rate |
| 31–50 years | 1900–2500 | 1500–2000 | Metabolism slows slightly |
| 51–70 years | 1700–2200 | 1400–1900 | Reduced muscle mass lowers BMR |
| 70+ years | 1600–2000 | 1300–1700 | Protein needs increase despite lower calorie needs |
These are approximate ranges for moderately active individuals. Use our calculator for a personalised estimate based on your specific measurements and activity level.
Common Indian Foods — Calorie Reference Guide
Tracking calories in Indian food can be challenging due to the variety of cooking methods and regional differences. Here is a reference guide for common Indian foods:
| Food Item | Serving Size | Approximate Calories | Protein |
|---|---|---|---|
| Roti (phulka) | 1 piece (30g) | 70–80 kcal | 2–3g |
| Paratha (plain) | 1 piece (60g) | 150–180 kcal | 4–5g |
| Cooked rice (white) | 1 cup (200g) | 200–220 kcal | 4g |
| Dal (toor/masoor) | 1 cup (200ml) | 140–180 kcal | 8–10g |
| Rajma curry | 1 cup (200ml) | 200–230 kcal | 12g |
| Paneer (raw) | 100g | 260–280 kcal | 18g |
| Curd (dahi) | 1 cup (200ml) | 120–140 kcal | 8g |
| Chicken curry | 1 serving (150g) | 250–300 kcal | 25g |
| Egg (boiled) | 1 large | 70–80 kcal | 6g |
| Samosa | 1 piece (100g) | 150–200 kcal | 4g |
| Masala chai | 1 cup (200ml) | 60–80 kcal | 2g |
| Biryani (chicken) | 1 plate (350g) | 450–600 kcal | 30g |
Tips for Managing Calories Effectively
- Don't cut too fast: Aggressive deficits cause muscle loss, fatigue, and are unsustainable. Aim for 0.5 kg/week maximum.
- Prioritise protein: Aim for 1.4–1.6 g protein per kg body weight. Protein preserves muscle during weight loss and increases satiety.
- Don't eliminate carbs: Carbohydrates are the body's preferred fuel, especially for exercise. Focus on complex carbs (dal, oats, brown rice, roti) over refined carbs.
- Track honestly: Most people underestimate calorie intake by 20–40%. Use a food diary or app for accurate tracking.
- Meal timing matters less than totals: Total daily calories and protein matter more than when you eat. Focus on hitting daily targets consistently.
- Account for cooking oil: Indian cooking often uses significant amounts of oil. 1 tablespoon of oil = 120 calories. Track oil when cooking at home.
- Eat mindfully: Eat slowly, without distractions, and stop when 80% full. This reduces overeating significantly.
Why Is 1200 Calories Too Low?
1200 calories is widely cited as the minimum for women (1500 for men) because going below this level makes it very difficult to meet daily requirements for essential vitamins and minerals — even with careful food selection. Risks of very low calorie diets include:
- Muscle loss — the body breaks down muscle for energy
- Metabolic adaptation — the body slows metabolism to conserve energy
- Nutritional deficiencies — iron, calcium, B vitamins, vitamin D
- Hormonal disruption — thyroid, cortisol, sex hormones
- Fatigue, poor concentration, and reduced physical performance
- Rebound weight gain after stopping the diet