🔥 Calorie Calculator

Estimate how many calories you need each day based on your gender, age, height, weight, and activity level.

📘 What Is a Calorie Calculator?

A Calorie Calculator helps you estimate how many calories your body needs each day to maintain, lose, or gain weight. It uses your age, height, weight, gender, and activity level to give a personalized calorie estimate.

🧮 How It Works

The calculator uses the Mifflin-St Jeor Equation to calculate your BMR (Basal Metabolic Rate), which is the number of calories your body burns at rest. It then multiplies your BMR by your activity level to give you a Total Daily Energy Expenditure (TDEE). 


For men: BMR = 10 × weight + 6.25 × height − 5 × age + 5  
For women: BMR = 10 × weight + 6.25 × height − 5 × age − 161  
Calories Needed = BMR × Activity Level

📌 Example

A 30-year-old woman who weighs 65 kg, is 165 cm tall, and exercises 3–5 times a week has a BMR of around 1,385 kcal. With moderate activity, her daily calorie needs are approximately 1,385 × 1.55 = 2,147 kcal/day.

🎯 Why Use This Calculator?

  • Planning a diet? Know how many calories you should eat each day.
  • Trying to lose weight? Use your TDEE to set a calorie deficit goal.
  • Gaining muscle? Find out how many extra calories you need to bulk effectively.
  • Just curious? See how your daily needs change with age or activity levels.

🙋‍♀️ Frequently Asked Questions

Q. Can this help me lose weight?

Yes! By eating fewer calories than your TDEE, you can create a calorie deficit and lose weight over time.

Q. How accurate is the result?

This calculator gives a close estimate, but your actual needs can vary based on muscle mass, metabolism, and lifestyle.

Q. Should I update my inputs regularly?

Absolutely. Update your age, weight, or activity level if they change—especially if you're actively working toward a fitness goal.