Calorie Calculator

A calorie calculator estimates the number of calories you need daily based on your age, gender, weight, height, and activity level.

A unit of energy. In nutrition, it refers to kilocalories (kcal) — the energy food provides.

Total Daily Energy Expenditure — the total calories your body burns in a day, including all activities and basic functions.

The number of calories your body needs at complete rest to maintain basic functions.

The number of calories needed to maintain your current weight without gaining or losing.

Consuming fewer calories than your TDEE, leading to weight loss.

Consuming more calories than your TDEE, leading to weight gain.

How physically active you are, affecting your total calorie needs.

Nutrients needed in large amounts: carbohydrates, proteins, and fats.

Body weight minus fat mass — includes muscle, bone, and organs.

The ratio of fat mass to lean mass in your body.

Little to no exercise, typical desk job.

Light exercise 1-3 days per week.

Moderate exercise 3-5 days per week.

Hard exercise 6-7 days per week.

Enter age, gender, weight, height, and activity level. Calculator shows TDEE.

Input personal details, select activity level. Click "Calculate" for daily calorie needs.

Calculate TDEE and subtract 500 calories for gradual weight loss.

Calculate TDEE and add 300-500 calories for muscle gain.

Use TDEE as your maintenance calorie target.

Select the activity level that best describes your typical week.

Adjust calorie target based on weight loss, gain, or maintenance goals.

Calculate calories first, then allocate percentages to carbs, protein, fat.

Enter your specific measurements for personalized results.

Calorie needs decrease with age due to metabolism changes.

Men typically have higher calorie needs due to muscle mass.

Select very active or extra active for high exercise levels.

Enter age and reduced activity level for accurate needs.

Consult healthcare provider for specific calorie needs during pregnancy.

Additional 300-500 calories typically needed during breastfeeding.

Provides the foundation for weight management and nutrition planning.

Knowing your TDEE helps set appropriate calorie targets for your goals.

More active people need more calories to fuel their activities.

Metabolism slows with age, reducing calorie requirements.

Men typically have more muscle mass, requiring more calories.

Heavier individuals burn more calories at rest and during activity.

Taller individuals have more lean mass, requiring more calories.

Correct calorie targets prevent metabolic adaptation and weight loss plateaus.

Weight change occurs when calories consumed differ from calories expended.

Individual factors significantly affect calorie needs.

Yes. Works for children, adults, and seniors.

Yes. Separate formulas for males and females.

Yes. Enter weight in kg or lbs.

Yes. Enter height in cm or feet/inches.

Yes. Choose from sedentary to extra active.

Yes. Provides calorie deficit targets.

Yes. Provides calorie surplus targets.

Yes. Shows calories needed to maintain current weight.

Yes. Adjust targets based on specific objectives.

Yes. Personalized based on your measurements.

Yes. High activity levels supported.

Yes. Age-appropriate calculations.

Yes. kg/lbs, cm/feet/inches supported.

Yes. Daily, weekly, and monthly targets.

Yes. Learn about calorie needs and nutrition.

Yes. Uses validated formulas (Mifflin-St Jeor, Harris-Benedict).

Yes. Completely free with no registration.

Yes. All calculations in your browser.

Yes. Based on established nutritional science.

Yes. Used by dietitians and nutritionists.

Yes. Updated with current research.

Yes. Works on all devices.

Yes. Provides personalized results vs generic estimates.

Yes. Simple interface for all levels.

No. Consult healthcare providers for specific conditions.

BMR is calories at rest; TDEE includes all daily activities.

Deficit leads to weight loss; surplus leads to weight gain.

They are typically the same — calories needed to maintain weight.

Calories measure energy; macros are specific nutrient types.

Gross includes all calories; net excludes calories from exercise.

Active requires more calories; sedentary needs fewer.

Males typically need more calories due to muscle mass.

Younger people typically have higher metabolism.

Lean individuals have higher BMR per pound of body weight.

Needs are what your body requires; intake is what you consume.

When starting a weight management program or adjusting nutrition.

When weight changes significantly or activity level changes.

When managing specific health conditions or athletic performance.

When current calorie intake is not producing desired results.

When trying to build muscle or increase body weight.

When reaching goal weight and transitioning to maintenance.

After establishing calorie targets, allocate to specific nutrients.

For specific health conditions, pregnancy, or athletic training.

As a starting point, then adjust based on actual results.

When trying to understand eating patterns or meet specific goals.

Yes. Displays total daily energy expenditure.

Yes. Shows basal metabolic rate.

Yes. Provides targets for weight loss or gain.

Yes. All calculations in your browser.

No. For privacy, results are not stored.

Some versions include macronutrient breakdown.

Yes. Compatible with all modern browsers.

Yes. kg/lbs, cm/feet/inches.

Yes. Multiple activity levels to choose from.

Some versions include visual representations.

Select the level that best describes your typical weekly exercise.

Mifflin-St Jeor is generally considered most accurate for most people.

Accurate TDEE calculation and clear activity level selection.

Base on current goals — deficit for loss, maintenance for current weight.

Use one with validated formulas and clear explanations.

Enter details, select moderate activity. Result: ~2,400-2,600 calories.

Enter details, select light activity. Result: ~1,800-2,000 calories.

Add 300-500 to TDEE for lean muscle gain.

Toggle between kg/lbs and cm/feet/inches.

Daily needs × 7 for weekly, × 30 for monthly.

Men: 10W + 6.25H - 5A + 5; Women: 10W + 6.25H - 5A - 161

Revised formula multiplying BMR by activity factor for TDEE.

Sedentary (1.2), Light (1.375), Moderate (1.55), Very (1.725), Extra (1.9).

Estimates based on averages; individual metabolism varies.

Generally within 10% for most people; actual needs may vary.

Ensure all fields are filled with valid numbers.

Different formulas and activity factors may be used.

Calorie needs change with weight, age, and activity.

Weight, height, and age must be positive numbers.

Important health decisions should use multiple methods.

No. This Calorie Calculator is an informational tool for educational purposes only. It should never replace professional medical advice, diagnosis, or treatment. Always consult a licensed healthcare provider for medical decisions.

The formulas used in this Calorie Calculator are based on peer-reviewed research and guidelines from recognized health organizations including the WHO, CDC, and NIH. Sources are listed in the references section.

Health calculators provide estimates based on population-level data. Individual results may vary due to factors like muscle mass, genetics, medical conditions, and lifestyle. Use results as general guidance, not definitive diagnoses.