Calculate your BMR, TDEE, and daily calorie needs based on your activity level.
Your Information
yr
15 - 80 years
kg
30 - 300 kg
cm
100 - 250 cm
Based on weekly exercise frequency
BMR (Basal Metabolic Rate)1,667
TDEE (Maintenance)2,583
Mild Weight Loss (-250 cal)2,333
Weight Loss (-500 cal)2,083
Extreme Weight Loss (-1000 cal)1,583
Muscle Gain (+300 cal)2,883
How TDEE Works
Your Total Daily Energy Expenditure (TDEE) is the total number of calories you burn daily. It's calculated using your Basal Metabolic Rate (BMR) multiplied by an activity factor that represents your exercise level.
Formula: TDEE = BMR × Activity Multiplier
We use the Mifflin-St Jeor equation, which is the most accurate modern formula for BMR calculation.
Activity Levels Explained
Sedentary: Little or no exercise, mostly sitting
Light: Exercise 1-3 days per week, light activity
Moderate: Exercise 3-5 days per week, moderate intensity (most people)
Active: Exercise 6-7 days per week, higher intensity
Very Active: Intense exercise twice per day or athletic training
Calorie Deficit for Weight Loss
Healthy Weight Loss: A deficit of 300-500 calories per day results in losing 0.5-1 lb per week, which is sustainable and minimizes muscle loss.
Aggressive Loss: A 1000 calorie deficit (2 lbs/week) is maximum recommended without medical supervision. Larger deficits can cause muscle loss, fatigue, and metabolic damage.
Why Moderate is Better: Gradual weight loss preserves muscle mass, maintains metabolism, and is easier to sustain long-term. Rapid weight loss often leads to rebound weight gain.
A calorie calculator is a health and fitness tool that determines how many calories your body burns daily based on your age, gender, weight, height, and physical activity level. This tool calculates two key metrics: your Basal Metabolic Rate (BMR) — calories burned at complete rest — and your Total Daily Energy Expenditure (TDEE) — total calories burned including physical activity. Understanding your daily calorie needs is fundamental for weight management, whether your goal is losing weight, maintaining your current weight, or building muscle mass.
Our free calorie calculator uses the scientifically-validated Mifflin-St Jeor equation, which is the most accurate modern formula for predicting metabolic rate. By entering your personal information and activity level, you instantly receive customized calorie targets for various fitness goals, including mild weight loss, aggressive fat loss, and muscle gain calculations.
Calorie Calculation Formulas
Calculating calories burned requires understanding the formulas used by nutritionists and fitness professionals. There are two primary equations used in calorie calculation: the Mifflin-St Jeor equation (modern, more accurate) and the Harris-Benedict equation (older, still used for comparison).
Mifflin-St Jeor Equation (Recommended)
For Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5
For Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161
This equation is preferred by most nutritionists and fitness professionals because it provides more accurate BMR estimates for a wider range of body types and populations. Studies have shown it to be approximately 10% more accurate than the Harris-Benedict equation.
Harris-Benedict Equation (Original)
For Men: BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) - (5.677 × age in years)
For Women: BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) - (4.330 × age in years)
While older, this equation remains relevant and produces comparable results, particularly for individuals with average body composition.
TDEE Calculation
Formula: TDEE = BMR × Activity Multiplier
Once you have your BMR, multiply it by an activity factor (ranging from 1.2 for sedentary to 1.9 for very active) to calculate your total daily energy expenditure. This accounts for calories burned through daily activities and exercise.
How to Use This Calorie Calculator
Our calorie calculator provides comprehensive daily calorie recommendations based on your personal metrics. Follow these steps to get accurate results:
Enter Your Age: Use the slider or number input to select your age. This affects your metabolic rate, as metabolism typically decreases with age.
Select Your Gender: Choose male or female, as metabolic rates differ between genders due to body composition differences.
Input Your Weight: Enter your current weight in kilograms. The calculator accepts weights from 30-300 kg.
Set Your Height: Provide your height in centimeters. Height ranges from 100-250 cm.
Choose Activity Level: Select your typical weekly exercise frequency from sedentary to very active. This multiplier most significantly impacts your TDEE.
Review Results: The calculator instantly displays your BMR, maintenance calories (TDEE), and calorie targets for weight loss and muscle gain.
Plan Your Diet: Use the provided calorie targets to structure your nutrition plan for your specific fitness goal.
Activity Level Multipliers Explained
Your activity level is the most important variable in calculating TDEE. These multipliers represent different exercise frequencies and intensity levels:
Activity Level
Multiplier
Description
Sedentary
1.2
Little or no exercise, mostly sitting or desk work
Light Activity
1.375
Exercise 1-3 days per week, light to moderate intensity
Moderate Activity
1.55
Exercise 3-5 days per week, moderate intensity (most common)
Active
1.725
Exercise 6-7 days per week, intense workouts
Very Active
1.9
Intense exercise twice daily or athletic training
Calorie Calculation Examples
Let's walk through three realistic calorie calculation examples showing how BMR and activity multipliers affect daily calorie needs:
Example 1: 25-Year-Old Male, 70 kg, Moderate Activity
Muscle Gain: 3,741 calories/day (300 calorie surplus for muscle hypertrophy)
Daily Calorie Needs by Age and Gender
This reference table shows average daily calorie needs for sedentary to moderately active adults. Individual needs vary based on height, weight, and metabolism:
Age Group
Males (Moderate)
Females (Moderate)
20-25 years
2,600-2,800
2,000-2,200
26-35 years
2,400-2,600
1,800-2,000
36-45 years
2,200-2,400
1,600-1,800
46-55 years
2,000-2,200
1,400-1,600
56+ years
1,800-2,000
1,200-1,400
Note: These are estimates for average height and weight. Use our calculator for personalized recommendations based on your exact measurements.
Calories for Weight Loss vs Weight Gain
Managing your calorie intake is fundamental to body composition goals. Understanding the relationship between calorie surplus/deficit and body weight change helps you plan realistic and sustainable nutrition strategies.
Weight Loss: Creating a Calorie Deficit
The 500-Calorie Deficit Rule: A deficit of 500 calories per day (or 3,500 per week) results in losing approximately 0.5 kg (1 pound) per week. This rate is considered sustainable and allows your body to preserve muscle mass while primarily losing fat.
Mild Deficit (250 calories): Loses approximately 0.25 kg/week (0.5 lbs/week). Slower but easier to maintain long-term with minimal hunger or energy loss.
Aggressive Deficit (750-1000 calories): Loses 0.75-1 kg/week (1.5-2 lbs/week). Maximum recommended without medical supervision. Higher risk of muscle loss, fatigue, and metabolic adaptation.
Why Moderate Deficit is Better: Rapid weight loss often leads to muscle loss, nutritional deficiencies, and metabolic slowdown. Research shows that people who lose weight slowly (0.5-1 kg/week) maintain better muscle mass and are more successful at keeping weight off long-term.
Weight Gain: Creating a Calorie Surplus
Lean Muscle Gain: A surplus of 300-500 calories per day supports muscle growth when combined with strength training. This slower surplus minimizes fat gain while maximizing protein synthesis for muscle development.
Faster Gain: A surplus exceeding 500 calories daily results in more fat gain along with muscle. Useful for athletes in off-season wanting rapid size gains but requires careful planning to limit unnecessary fat accumulation.
Protein Critical for Growth: Calorie surplus alone doesn't build muscle. You must consume adequate protein (1.6-2.2g per kg body weight) and perform resistance training for muscle growth.
Safe Weight Loss Rate
The safest weight loss rate is 0.5-1 kg per week (1-2 pounds/week). Losing faster increases risk of:
Muscle mass loss (not just fat loss)
Nutritional deficiencies and micronutrient inadequacies
Metabolic slowdown and reduced calorie burn
Hair loss, gallstones, and hormonal disruptions
Weight regain after diet ends (rebound weight gain)
Macronutrient Split for Different Goals
While total calorie intake determines weight change, macronutrient ratios (protein, carbohydrates, fats) influence body composition quality, energy levels, and performance. These are recommended macronutrient splits for different fitness objectives:
Weight Loss Goal
Protein: 1.6-2.2g per kg body weight (high protein preserves muscle during deficit)
Carbohydrates: 2-3g per kg body weight (supports energy for training)
Fats: 0.5-1g per kg body weight (minimum for hormone function)
Note: Individual needs vary. Start with these guidelines and adjust based on hunger, energy levels, performance, and progress. Track your nutrition for 2-4 weeks before making adjustments.
Common High-Calorie and Low-Calorie Foods Reference
Understanding calorie density helps you make strategic food choices aligned with your goals. High-calorie foods provide energy efficiently, while low-calorie foods allow higher volume eating when in a deficit.
Low-Calorie Foods (for weight loss)
Food
Serving Size
Calories
Chicken Breast (cooked)
100g
165
Egg White
1 large
17
Greek Yogurt (non-fat)
100g
59
Broccoli (cooked)
100g
34
Salmon (cooked)
100g
206
Brown Rice (cooked)
100g
111
Spinach (raw)
100g
23
High-Calorie Foods (for muscle gain)
Food
Serving Size
Calories
Peanut Butter
2 tablespoons
190
Almonds
1 ounce (23 nuts)
164
Avocado
1/2 medium
120
Whole Milk
1 cup (240ml)
149
Olive Oil
1 tablespoon
119
Granola
1/4 cup
200
Dark Chocolate
1 ounce (28g)
168
Frequently Asked Questions About Calories and TDEE
How many calories do I need to lose weight?
To lose weight, consume fewer calories than your TDEE. A deficit of 300-500 calories below your maintenance level results in 0.25-0.5 kg (0.5-1 lb) weekly loss, which is sustainable. To calculate your specific calorie target: take your TDEE and subtract 300-500 calories. For example, if your TDEE is 2,400 calories, a weight loss target would be 1,900-2,100 calories daily.
What is BMR and how does it differ from TDEE?
BMR (Basal Metabolic Rate) is the minimum calories your body burns at complete rest to maintain basic functions like heartbeat, breathing, and cell production. TDEE (Total Daily Energy Expenditure) includes BMR plus calories burned through daily activities, exercise, and digestion. TDEE is always higher than BMR. BMR typically accounts for 60-70% of your TDEE in sedentary individuals and 50-60% in very active people.
Are all calories equal for weight loss?
From a pure weight loss perspective, a calorie deficit is a calorie deficit regardless of source. However, calorie sources affect hunger levels, energy, muscle preservation, and long-term adherence. Protein keeps you fuller longer than carbs or fats, high-fiber carbs are more satiating than processed carbs, and whole foods typically make diets easier to follow than processed foods. For optimal results, focus on calorie deficit while prioritizing protein and whole foods.
How do I accurately count calories?
Use a food scale and calorie tracking app (like MyFitnessPal) to measure your intake accurately. Weigh food when possible rather than estimating portions. Log everything including oils, condiments, and drinks. Track for at least 2-4 weeks to establish baseline consumption. Common tracking mistakes include underestimating portions, forgetting to log drinks, and not accounting for cooking oils. Start conservative and adjust based on weight loss results after 3-4 weeks.
What is a calorie deficit and how much deficit do I need?
A calorie deficit is consuming fewer calories than you burn. To lose 0.5 kg (1 lb) per week, you need a weekly deficit of 3,500 calories, which equals a 500-calorie daily deficit. To lose 1 kg (2 lbs) per week, create a 1,000-calorie daily deficit. Most people should aim for 300-500 calorie deficits for sustainable, healthy weight loss. Larger deficits increase muscle loss, metabolic slowdown, and adherence difficulties.
How many calories per day should I eat?
Your daily calorie target depends on your goal: maintenance (eat at TDEE), weight loss (TDEE minus 300-500), or muscle gain (TDEE plus 300-500). Use our calculator to find your personalized TDEE, then adjust based on your goal. For example, if your TDEE is 2,500 calories and you want to lose weight, aim for 2,000-2,200 calories daily. Adjust after 3-4 weeks based on results: if weight loss is slower than expected, decrease calories by 100-150; if faster than expected, increase by 100.
Does exercise burn enough calories to justify eating more?
Exercise burns calories, but typically less than you might think. A 30-minute moderate intensity workout might burn 200-300 calories. While this contributes to your deficit, it's easier to create a deficit through diet than to exercise enough to compensate for overeating. That said, exercise preserves muscle during weight loss, improves body composition, and provides health benefits beyond calorie burn. Use exercise to enhance your calorie deficit, not as permission to eat significantly more.
Should I eat back the calories I burn from exercise?
This depends on your approach. If you use TDEE (which includes estimated activity), don't eat back exercise calories—you'd be double-counting. If you use BMR and manually add activity multipliers, eating back 50-75% of exercise calories is reasonable. The most practical approach: use a TDEE calculator, stick to that calorie target regardless of daily exercise variation, and track your results. Adjust calories every 3-4 weeks based on actual weight change rather than daily exercise fluctuations.