Calorie Calculator
Use this Calorie Calculator to estimate your daily calorie needs based on your body measurements, activity level and goals.
Enter your details below to estimate your basal metabolic rate, maintenance calories, and daily calorie targets.
Your Daily Calorie Estimate
Enter your information above to estimate your daily calorie needs.
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About the Creator
MyCruncher — Founded by Bobby Dues
MyCruncher provides free online calculators designed to make everyday calculations easier to understand and use.
Meet Bobby Dues →How to Use the Calorie Calculator
A calorie calculator can help estimate how many calories your body may need each day. Enter your age, height, weight, sex and activity level to receive an estimated daily calorie target.
The calculator can also help you compare calorie needs for maintaining, losing or gaining weight. Your actual needs can vary based on body composition, activity, metabolism and other individual factors.
Understanding Daily Calorie Needs
Your body uses energy throughout the day for basic functions as well as movement and exercise. Basal metabolic rate estimates the energy your body uses at rest, while activity levels help estimate your total daily energy needs.
How Are Daily Calorie Needs Calculated?
Daily calorie estimates typically begin with your basal metabolic rate (BMR), which represents the energy your body uses at rest for essential functions such as breathing, circulation and maintaining body temperature.
Activity level is then used to estimate total daily energy expenditure (TDEE). This represents the approximate number of calories your body uses throughout an entire day, including everyday movement and physical activity.
Age, height, weight, sex and activity level all help estimate your daily calorie requirements. Results are starting estimates rather than exact measurements.
Calorie Calculation Example
Suppose your estimated maintenance calorie requirement is 2,200 calories per day.
This means approximately 2,200 calories could be a starting estimate for maintaining your current weight. Your actual requirements may differ depending on activity, body composition and other individual factors.
If your goal is to lose or gain weight, your calorie needs may differ from your maintenance estimate. Sustainable changes should account for your individual nutritional needs and health circumstances.
Frequently Asked Questions
How many calories do I need each day?
Daily calorie needs vary based on age, body size, sex, activity and individual metabolism. A calorie calculator provides a practical estimate using the information you enter.
What is the difference between BMR and TDEE?
BMR estimates the energy your body uses at rest. TDEE estimates your total daily energy needs, including physical activity and other daily energy expenditure.
Does exercise affect my calorie needs?
Yes. Physical activity generally increases the energy your body uses. More active individuals may require additional calories compared with less active individuals of similar age and body size.
Can I use this calculator for weight goals?
Yes. Estimated calorie requirements can help you understand maintenance needs and compare possible calorie targets for different weight goals. Individual results and nutritional requirements can vary.
How accurate is a calorie calculator?
Calorie calculators provide estimates based on general equations and activity assumptions. They cannot measure your exact metabolism or account for every individual factor affecting energy needs.
You can also explore more Health & Fitness Calculators on MyCruncher, including BMI, water intake, sleep and other everyday wellness tools.
These results are general estimates for planning purposes and are not a substitute for personalized nutrition or medical advice.