Calorie Calculator

How to Use the Calorie Calculator

1. Select your measurement system: US Units or Metric.
2. Enter your age and select your gender.
3. Enter your height and weight.
4. Select the activity level that best matches your typical exercise routine.
5. Click Calculate Calories to see your estimated daily calorie needs.

What Does a Calorie Calculator Do?

A calorie calculator estimates how many calories you may need each day based on factors such as age, gender, height, weight, and activity level. Your estimated daily calorie needs can be useful when planning a diet, managing your weight, or understanding how your activity level affects your energy needs.

This calculator provides estimates rather than exact calorie requirements. Individual calorie needs can vary based on factors that are not included in a basic calculation.

BMR and TDEE Explained

Your Basal Metabolic Rate (BMR) is an estimate of the energy your body uses each day at rest to maintain essential functions such as breathing and circulation.

Your Total Daily Energy Expenditure (TDEE) estimates the calories you burn throughout the day after taking your activity level into account. The calorie results in this calculator are based on your estimated BMR multiplied by an activity factor.

Calorie Calculator Formula

This calculator uses the Mifflin-St Jeor Equation to estimate BMR. The equation uses your weight, height, age, and gender.

After estimating BMR, the calculator applies an activity multiplier to estimate your daily calorie needs.

Activity Levels Explained

Your activity level helps estimate how many calories you use throughout a typical day.

• Sedentary: Little or no exercise.
• Light Exercise: Exercise about 1–3 days per week.
• Moderate Exercise: Exercise about 3–5 days per week.
• Heavy Exercise: Exercise about 6–7 days per week.
• Very Active: Very demanding physical activity or athletic training.

Frequently Asked Questions

How accurate is a calorie calculator?

Calorie calculators provide estimates rather than exact measurements. Actual calorie needs can vary between individuals depending on metabolism, body composition, activity, and other factors.

What is the difference between BMR and TDEE?

BMR estimates the calories your body needs at rest, while TDEE estimates your total daily calorie needs after accounting for physical activity.

How many calories should I eat to lose weight?

A calorie deficit generally results in weight loss over time. The calculator provides estimated calorie targets for different levels of weight loss, but individual results can vary.

Does the calculator work with pounds and kilograms?

Yes. You can switch between US Units and Metric Units. US Units use feet, inches, and pounds, while Metric Units use centimeters and kilograms.