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Fitness

Calorie Calculator

Calculate daily calorie needs for weight goals

FAQs

How many calories should I eat per day?

Daily calorie needs vary by age, gender, weight, height, and activity level. On average, adult women need 1,600-2,400 calories and men need 2,000-3,000 calories. Use our calculator for personalized recommendations.

What is the difference between BMR and TDEE?

BMR (Basal Metabolic Rate) is the calories your body burns at rest. TDEE (Total Daily Energy Expenditure) is your BMR plus calories burned through activity. TDEE represents your total daily calorie needs.

How many calories should I eat to lose weight?

For safe weight loss, create a calorie deficit of 500-750 calories per day, which typically results in 1-1.5 pounds of weight loss per week. Never go below 1,200 calories (women) or 1,500 calories (men) without medical supervision.

Does the calculator account for exercise?

Yes, our calculator includes activity level factors ranging from sedentary to very active. Your TDEE calculation incorporates your exercise habits to provide accurate calorie recommendations.

How to Use the Calorie Calculator

Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) to determine your daily calorie needs for weight loss, maintenance, or muscle gain.

  1. Enter your age, gender, weight, and height.
  2. Select your activity level from sedentary to very active.
  3. Choose your preferred unit system (metric or imperial).
  4. Review your BMR (calories burned at rest).
  5. See your TDEE (total daily calories including activity).
  6. Use the calorie targets for different goals (weight loss, maintenance, gain).

Calorie Calculation Formulas

The calculator uses the Mifflin-St Jeor equation, considered one of the most accurate BMR formulas.

BMR Formula (Men)

BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(years) + 5

Accounts for higher muscle mass in men typically.

Example:

Input: Male, 30 years, 70 kg, 175 cm

Calculation: BMR = 10 × 70 + 6.25 × 175 - 5 × 30 + 5 = 700 + 1093.75 - 150 + 5

Result: BMR = 1,648.75 calories/day

BMR Formula (Women)

BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(years) - 161

Includes adjustment factor for typically lower muscle mass in women.

Example:

Input: Female, 30 years, 60 kg, 165 cm

Calculation: BMR = 10 × 60 + 6.25 × 165 - 5 × 30 - 161 = 600 + 1031.25 - 150 - 161

Result: BMR = 1,320.25 calories/day

TDEE Calculation

TDEE = BMR × Activity Factor

Activity factors: Sedentary (1.2), Light (1.375), Moderate (1.55), Active (1.725), Very Active (1.9).

Example:

Input: BMR = 1,648, Moderate activity (1.55)

Calculation: TDEE = 1,648 × 1.55

Result: TDEE = 2,554 calories/day

Real-World Use Cases

Understanding your calorie needs is essential for achieving any weight or fitness goal.

Weight Loss Planning

Create a calorie deficit by eating 500-750 calories below TDEE for safe weight loss.

Example: TDEE of 2,200 calories - eat 1,700 calories daily to lose ~1 pound per week

Muscle Gain Planning

Eat 300-500 calories above TDEE to support muscle growth.

Example: TDEE of 2,200 calories - eat 2,500-2,700 calories daily for muscle gain

Weight Maintenance

Eat at TDEE to maintain current weight.

Example: TDEE of 2,200 calories - eat 2,200 calories daily to maintain weight

Meal Planning

Plan daily meals based on calorie targets from the calculator.

Example: Breakfast 500 cal, Lunch 600 cal, Dinner 700 cal, Snacks 400 cal = 2,200 total

Fitness Program Design

Match nutrition to training intensity and goals.

Example: High-intensity training days may require higher calorie intake than rest days

Tips & Best Practices

Tips

  • Be honest about your activity level - overestimating leads to eating too many calories.
  • Track your intake for 1-2 weeks and adjust based on actual results.
  • Don't go below 1,200 calories (women) or 1,500 calories (men) without medical supervision.
  • Increase activity level gradually rather than drastically reducing calories.
  • Reassess your calorie needs every 4-6 weeks as your weight and activity change.
  • Consider macro distribution alongside total calories for optimal results.

Common Mistakes to Avoid

  • Underestimating activity level and overeating relative to actual energy expenditure.
  • Creating too large a calorie deficit, leading to muscle loss and metabolic slowdown.
  • Not accounting for weekends or special occasions in calorie planning.
  • Using sedentary BMR multipliers when you're actually active.
  • Not adjusting calorie targets as you lose weight or change activity levels.

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