🍎Calorie Calculator
Calculate your daily calorie needs based on your TDEE and fitness goals. Get recommended protein, carbs, and fat macros for weight loss, maintenance, or gain.
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Daily Calorie Target
2,693
To maintain weight, aim for 2693 calories per day. Your maintenance level (TDEE) is 2693 calories.
Macro Breakdown (Calories)
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Calorie Calculator: How Many Calories Should I Eat Per Day?
A calorie calculator takes the guesswork out of daily nutrition by estimating exactly how many calories you need based on your age, weight, height, activity level, and goal. Whether you want to lose weight, maintain your current weight, or build muscle, knowing your daily calorie target is the foundation of any effective nutrition plan. This calculator uses the Mifflin-St Jeor equation, the most validated method available for estimating metabolic rate.
Calorie Calculator for Weight Loss: How a Deficit Works
Weight loss comes down to a caloric deficit: burning more energy than you consume. One pound of body fat stores approximately 3,500 calories. To lose one pound per week, you need a deficit of 500 calories per day through eating less, moving more, or both. A 1,000-calorie daily deficit produces roughly two pounds of weight loss per week.
Cutting calories below 1,200 per day for women or 1,500 for men is generally not recommended without medical supervision. Severe restriction triggers metabolic adaptation, where your BMR decreases to conserve energy, and increases the risk of muscle loss and nutrient deficiencies. A moderate, sustainable caloric deficit of 300 to 500 calories per day is the most effective long-term approach for most people.
Daily Calorie Intake Calculator by Age: Why Needs Change Over Time
Age directly affects how many calories you need. Metabolic rate declines roughly 1 to 2% per decade after age 20, primarily because of gradual muscle loss (sarcopenia). A 50-year-old burns approximately 100 to 200 fewer calories per day than they did at 25, even at the same weight and activity level. This is why the same diet that maintained weight at 30 may cause weight gain at 50.
The Mifflin-St Jeor equation accounts for age in its formula, making it more accurate than older equations like Harris-Benedict for adults of all ages. Resistance training is the most effective way to preserve muscle mass and slow the age-related decline in metabolism.
How to Calculate a Calorie Deficit Using TDEE and BMR
Your Basal Metabolic Rate (BMR) is the number of calories your body burns at rest just to keep you alive. Your TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor that accounts for all movement throughout the day, including exercise, work, and everyday activity.
Your caloric deficit for weight loss is calculated as: TDEE minus your target calorie intake. If your TDEE is 2,400 calories and you eat 1,900 calories per day, your daily deficit is 500 calories, targeting roughly one pound per week of fat loss. To build muscle, you need a calorie surplus above TDEE, typically 250 to 500 calories per day combined with resistance training.
Activity Level Multipliers Explained
- Sedentary (1.2): Desk job, no structured exercise
- Lightly Active (1.375): Light exercise or walking 1 to 3 days per week
- Moderately Active (1.55): Exercise 3 to 5 days per week
- Very Active (1.725): Hard training 6 to 7 days per week
- Extra Active (1.9): Physical job or twice-daily training
Most people overestimate their activity level. If results do not match expectations after two to four weeks of tracking, try a lower activity multiplier and recalculate.
Calorie Calculator for Men and Women: Are the Numbers Different?
Yes. The Mifflin-St Jeor equation uses a different constant for men and women. Men typically have a higher BMR than women of the same height and weight because they carry more lean muscle mass. On average, men require 200 to 400 more calories per day than women of similar size and activity level. Hormonal factors also influence metabolism in women, particularly around menstruation, pregnancy, and menopause.
Macronutrients: Getting the Most from Your Calorie Budget
Calories determine weight change, but macronutrients determine body composition and energy levels. Protein provides 4 calories per gram and is essential for preserving muscle mass during a caloric deficit. Carbohydrates also provide 4 calories per gram and fuel exercise performance and brain function. Fat provides 9 calories per gram and supports hormones and absorption of fat-soluble vitamins.
A starting macro split of 30% protein, 40% carbohydrates, and 30% fat works well for most people. Those focused on weight loss benefit from higher protein intake (up to 35%) to stay full and protect muscle. Endurance athletes typically need more carbohydrates to sustain performance.
Frequently Asked Questions
How many calories do I need to lose 1 pound per week?
To lose one pound per week, you need a daily caloric deficit of approximately 500 calories. Since one pound of fat equals about 3,500 stored calories, a 500-calorie daily deficit produces roughly one pound of weight loss over seven days. You can achieve this through eating less, increasing physical activity, or a combination of both. Most nutrition experts recommend splitting the deficit between diet and exercise rather than relying entirely on food restriction, which helps preserve muscle mass and metabolic rate.
What is a safe calorie deficit for weight loss?
A safe and sustainable caloric deficit is generally 300 to 500 calories per day for most adults, targeting 0.5 to 1 pound of weight loss per week. A deficit up to 750 to 1,000 calories per day (targeting up to 2 pounds per week) is considered aggressive but manageable for people with significant weight to lose. Deficits larger than 1,000 calories per day are associated with muscle loss, micronutrient deficiencies, and metabolic slowdown, and should only be followed under medical supervision.
Does exercise increase how many calories I need?
Yes. Exercise increases your TDEE and therefore your daily calorie needs. A 30-minute moderate-intensity run burns roughly 300 to 400 calories for an average adult. On high-exercise days, eating closer to maintenance calories is recommended to support recovery and prevent muscle breakdown. Many people are surprised to find that exercise alone contributes less to weight loss than expected because it also increases appetite. The most effective weight management strategy combines a moderate dietary deficit with consistent physical activity.
How accurate are calorie calculators?
The Mifflin-St Jeor equation used in this calculator is accurate within 10 to 15% for most people. Individual metabolic variation is real: two people of the same age, height, and weight can have resting metabolic rates that differ by 20 to 30%. The best approach is to treat the calculator result as a starting estimate, then track your actual weight for two to four weeks. If you are not losing or gaining at the expected rate, adjust your calorie target by 100 to 200 calories in the appropriate direction and reassess after another two weeks.