Calorie Calculator
Calculate daily calorie needs based on goals and activity
Settings & input
Your inputs are never uploaded or stored.
Results
Enter your values to see the results.
Reference & calculation details
About Free Calorie Calculator & Macro Planner
Understanding how many calories your body needs each day is the foundation of any successful nutrition plan. Our free calorie calculator uses the Mifflin-St Jeor equation, widely regarded as the most accurate method for estimating Basal Metabolic Rate (BMR), to determine how many calories you burn at rest. It then factors in your activity level to calculate your Total Daily Energy Expenditure (TDEE) and adjusts the result based on your goal, whether that is losing weight, maintaining weight, or gaining muscle.
Beyond a simple calorie number, the tool provides a complete macronutrient breakdown with recommended grams of protein, carbohydrates, and fat based on a balanced 30/40/30 split. This gives you actionable targets to structure your meals around, making it easier to hit both your calorie and nutritional goals every day.
The calculator supports both metric and imperial units, five activity levels from sedentary to extremely active, and five goal settings ranging from aggressive weight loss (-1 kg/week) to fast muscle gain (+1 kg/week). Results appear immediately, and the copy button puts the full result on your clipboard for meal planning and journaling.
Key Features
- Mifflin-St Jeor equation for accurate BMR estimation based on age, gender, weight, and height
- TDEE calculation with five activity levels: sedentary, lightly active, moderately active, very active, and extremely active
- Five goal settings: lose weight fast, lose weight, maintain weight, gain weight, and gain weight fast
- Macronutrient breakdown showing recommended daily protein, carbohydrate, and fat intake in grams
- Support for both metric (kg, cm) and imperial (lbs, inches) unit systems
- One-click copy button to export your results for meal planning apps or journals
- Clear visual display with color-coded BMR, TDEE, and macro cards
- Calorie target prominently displayed with daily calorie count
- Age, weight, and height are not saved or sent anywhere
- Fully responsive design for desktop, tablet, and mobile use
How to Use the Calorie Calculator
- Select your unit system: Choose Metric (kg/cm) or Imperial (lbs/in) depending on the measurements you have.
- Enter your details: Input your gender, age, weight, and height in the form fields.
- Choose your activity level: Select the option that best describes your typical weekly exercise and daily physical activity.
- Set your goal: Pick from five options ranging from fast weight loss to fast weight gain, or maintain your current weight.
- Click Calculate Calories: The tool instantly displays your daily calorie target, BMR, TDEE, and recommended macros.
- Copy your results: Click "Copy Results" to save the full breakdown to your clipboard for use in meal planning or fitness tracking apps.
Use Cases
- Weight loss planning: Determine the right calorie deficit to lose weight safely at 0.5 to 1 kg per week without extreme restriction.
- Muscle building: Calculate the calorie surplus needed to support strength training and muscle growth while minimizing fat gain.
- Maintenance tracking: Find your maintenance calories to sustain your current weight and body composition.
- Meal prep guidance: Use the macro breakdown to plan meals that hit your protein, carb, and fat targets for the day.
- Athletic performance: Athletes can match their calorie intake to training intensity for optimal energy and recovery.
- Post-diet transition: After a weight loss phase, use the maintain setting to find your new maintenance level and avoid rebound weight gain.
- Health awareness: Simply learn how many calories your body needs based on your unique profile and lifestyle.
Frequently Asked Questions
What is the Mifflin-St Jeor equation?
The Mifflin-St Jeor equation is a formula developed in 1990 that estimates Basal Metabolic Rate based on weight, height, age, and gender. It is considered more accurate than the older Harris-Benedict equation by most nutrition professionals.
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest to maintain vital functions like breathing and circulation. TDEE (Total Daily Energy Expenditure) adds the calories burned through daily activity and exercise on top of your BMR.
How accurate is this calculator?
The Mifflin-St Jeor equation provides a reliable estimate for most people. However, individual factors like genetics, body composition, hormonal conditions, and medications can cause your actual needs to differ. Use the result as a starting point and adjust based on real-world results over 2-4 weeks.
Is it safe to lose 1 kg per week?
For most adults, losing 0.5 to 1 kg per week through a moderate calorie deficit is considered safe. Faster weight loss may lead to muscle loss, nutritional deficiencies, and metabolic slowdown. Always consult a healthcare professional before starting an aggressive diet.
Tips & Best Practices
- Be honest about activity level: Overestimating your activity will inflate your calorie target. Choose the level that truly matches your average week.
- Start with maintenance: If you are unsure of your goal, begin at the maintenance level for two weeks, track your weight, and then adjust up or down.
- Prioritize protein: Regardless of your goal, hitting your protein target supports muscle retention during weight loss and muscle building during a surplus.
- Adjust every 4-6 weeks: As your weight changes, recalculate your calories to reflect your new body composition and maintain progress.
- Use a food tracking app: Copy your macro targets into a food diary app to monitor your daily intake and stay on track with your goals.
- Consult a professional: If you have a medical condition, are pregnant, or have specific dietary needs, work with a registered dietitian for personalized guidance.