How Many Calories Should I Eat? Complete Calculator & Guide
Calculate your exact daily calorie needs for weight loss, maintenance, or muscle gain. No more guessing — use science-backed formulas.
Free Calorie & TDEE Calculator
Get your personalized calorie target in seconds. Calculate TDEE, BMR, and macros all in one place.
Calculate My Calorie NeedsQuick Answer: Calories by Goal
| Goal | Calorie Adjustment | Expected Rate |
|---|---|---|
| Fat Loss | TDEE - 300 to 500 | 0.5-1 lb/week |
| Maintenance | = TDEE | No change |
| Muscle Gain | TDEE + 200 to 300 | 0.25-0.5 lb/week |
What Are Calories?
A calorie is a unit of energy. The food you eat provides calories, and your body burns them through:
- BMR (Basal Metabolic Rate): Energy used at complete rest — about 60-70% of daily burn
- TEF (Thermic Effect of Food): Energy used digesting food — about 10% of daily burn
- NEAT (Non-Exercise Activity): Walking, fidgeting, standing — 15-30% of daily burn
- EAT (Exercise Activity): Formal workouts — 5-15% of daily burn
How to Calculate Your TDEE
Step 1: Calculate BMR
Use the Mifflin-St Jeor equation:
- Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5
- Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161
Step 2: Apply Activity Multiplier
| Activity Level | Multiplier | Description |
|---|---|---|
| Sedentary | × 1.2 | Desk job, little exercise |
| Lightly Active | × 1.375 | 1-3 days light exercise/week |
| Moderately Active | × 1.55 | 3-5 days moderate exercise/week |
| Very Active | × 1.725 | 6-7 days hard exercise/week |
| Extremely Active | × 1.9 | Physical job + hard training |
Step 3: Adjust for Your Goal
- Lose weight: Subtract 300-500 calories from TDEE
- Maintain: Eat exactly your TDEE
- Build muscle: Add 200-300 calories to TDEE
Example Calculation
Person: 30-year-old male, 75kg, 180cm, moderately active, wants to lose fat.
- BMR = (10 × 75) + (6.25 × 180) - (5 × 30) + 5 = 1,730 calories
- TDEE = 1,730 × 1.55 = 2,682 calories
- Fat loss target = 2,682 - 500 = 2,182 calories/day
Common Calorie Counting Mistakes
- Underestimating portion sizes: A "handful" of nuts is often 2-3 servings. Use a food scale for accuracy.
- Forgetting liquid calories: Coffee drinks, smoothies, and alcohol add up fast.
- Inconsistent tracking: Track every day, including weekends. One untracked day can undo a week of deficit.
- Overestimating activity: Most people overestimate their activity level. When in doubt, choose the lower category.
- Ignoring metabolic adaptation: As you lose weight, your TDEE decreases. Recalculate every 4-6 weeks.
Related Tools
- TDEE Calculator — Calculate your total daily energy expenditure
- Calorie Calculator — Find your maintenance and target calories
- Macro Calculator — Split your calories into protein, carbs, and fat
Frequently Asked Questions
How many calories should I eat to lose weight?
To lose weight, eat 300-500 calories below your TDEE. This creates a sustainable deficit of 0.5-1lb (0.25-0.5kg) per week. For faster loss, a 750-calorie deficit yields 1.5lb per week, but don't drop below 1,200 calories/day for women or 1,500 for men without medical supervision.
How many calories should I eat to build muscle?
To build muscle, eat 200-300 calories above your TDEE. This small surplus provides energy for muscle growth while minimizing fat gain. Combine with adequate protein (1.6-2.2g/kg) and progressive resistance training.
How do I calculate my TDEE?
Calculate TDEE by first finding your BMR using the Mifflin-St Jeor equation, then multiply by an activity factor: Sedentary (×1.2), Lightly Active (×1.375), Moderately Active (×1.55), Very Active (×1.725), or Extremely Active (×1.9).
Calculate Your Calorie Needs Now
Get your personalized calorie target based on your stats, activity level, and goals.
Use Free TDEE Calculator