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Health & Body Suite

Calorie Calculator

Determine your daily target calories based on your specific weight goal: lose, maintain, or gain weight.

Body Characteristics

Biological Sex

Frequently Asked Questions (FAQ)

How do you calculate my daily calorie needs?

We start by calculating your Basal Metabolic Rate (BMR) using your weight, height, age, and biological sex. Then, we apply an activity multiplier based on how active you are throughout the week to find your Total Daily Energy Expenditure (TDEE).

How big of a calorie deficit is safe for losing weight?

A deficit of 250 to 500 calories per day is generally safe and sustainable, helping you lose about 0.5 to 1 pound per week. Going below 1,200 calories per day isn't recommended unless supervised by a medical professional.

Should I change my calorie target on rest days?

You don't need to. Our calculation averages your activity levels across the entire week. Eating a consistent target makes it much easier to plan meals and hit your long-term goals.

Why is weight loss not always linear even if I hit my target?

Your body weight fluctuates daily due to water retention, salt intake, stress, sleep, and digestion. Focus on the weekly averages and monthly trends rather than day-to-day shifts.

Can I build muscle and lose fat at the same time?

Yes, this is known as body recomp. Eat at maintenance calories or a very mild deficit, keep your protein intake high (around 0.8g to 1g per pound of body weight), and do regular strength training.

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About This Calculator

Target Audience: Dieters, bodybuilders & weight loss planners

💡 What Does This Calculator Do?

The Calorie Calculator estimates your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor formula. It provides precise daily calorie intake targets for weight loss, muscle gain, or weight maintenance based on your activity level.

📋 How to Use It

  1. 1
    Personal Metrics: Enter your age, gender, weight, and height.
  2. 2
    Activity Level: Choose your weekly physical activity level (Sedentary, Lightly Active, Moderate, Very Active).
  3. 3
    Goal Target: Select Weight Loss (-500 kcal/day), Maintenance, or Weight Gain (+500 kcal/day).

🧬 The Logic Explained Simply

  • The Concept: BMR is the energy your body burns at complete rest. TDEE multiplies BMR by an activity factor to calculate total energy consumed throughout the day.
  • The Formula: Male BMR = (10 × W_kg) + (6.25 × H_cm) - (5 × Age) + 5; Female BMR = (10 × W_kg) + (6.25 × H_cm) - (5 × Age) - 161; TDEE = BMR × Activity Multiplier.

💡 Real-World Calculation Breakdown

For a 30-year-old male weighing 80 kg at 180 cm height with moderate exercise (multiplier 1.55):

  1. 1
    BMR = (10 × 80) + (6.25 × 180) - (5 × 30) + 5 = 1,780 kcal/day at rest.
  2. 2
    TDEE Maintenance = 1,780 × 1.55 = 2,759 kcal/day.
  3. 3
    Fat Loss Target (-20% deficit) = 2,207 kcal/day to lose approx 0.5 kg (1 lb) per week!

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