How Many Calories A Day Calculator

Your Estimated Daily Calories:

Introduction: Knowing how many calories you need daily is crucial for maintaining a healthy lifestyle. This calculator uses the Harris-Benedict Equation to estimate your Basal Metabolic Rate (BMR) and adjusts it based on your activity level.

Formula: The calculator uses the Harris-Benedict Equation to calculate BMR:

  • For males: BMR = 88.362 + (13.397 * weight) + (4.799 * height) – (5.677 * age)
  • For females: BMR = 447.593 + (9.247 * weight) + (3.098 * height) – (4.330 * age)

The BMR is then multiplied by an activity factor based on your activity level (sedentary, lightly active, moderately active, very active, extra active) to get your estimated daily calories.

How to Use:

  1. Enter your weight in kilograms.
  2. Enter your height in centimeters.
  3. Enter your age in years.
  4. Select your gender.
  5. Choose your activity level.
  6. Click the “Calculate” button.
  7. View your estimated daily calories in the result section.

Example: For example, a 30-year-old male (70 kg, 175 cm) with a moderately active lifestyle might have an estimated daily calorie intake of around 2600 calories.


  1. Q: How accurate is this calculator for everyone?
    • A: This calculator provides estimates and may not account for individual variations. Consult with a nutritionist for personalized advice.
  2. Q: Can I use this calculator if I have a medical condition?
    • A: This calculator provides general estimates. Consult with a healthcare professional for personalized advice, especially if you have medical conditions.
  3. Q: Is the activity level selection important?
    • A: Yes, choosing the correct activity level ensures a more accurate estimation of your daily calorie needs.
  4. Q: Can this calculator help with weight loss or gain?
    • A: Yes, adjust your calorie intake based on your goals. For weight loss, consume fewer calories, and for weight gain, consume more calories. Consult with a nutritionist for guidance.
  5. Q: How often should I recalculate my estimated daily calories?
    • A: Recalculate if there are significant changes in your weight, activity level, or lifestyle.

Conclusion: Understanding your estimated daily calorie needs is a fundamental step in achieving your health and fitness goals. Use this calculator as a starting point, but remember that individual factors may vary. Consult with professionals for personalized advice on nutrition and lifestyle.

Leave a Comment