Calorie Calculator
Trending 🔥Calculate daily calorie needs based on your goals.
How to Use Calorie Calculator
- 1Enter your age, gender, weight, and height
- 2Select your activity level
- 3Choose your goal (lose, maintain, or gain)
- 4See your recommended daily calories and macros
About Calorie Calculator
The Calorie Calculator estimates your recommended daily calorie intake based on your personal profile — age, gender, weight, height, and activity level — and adjusts it for your specific goal: lose weight, maintain current weight, or gain weight.
The tool uses the Mifflin-St Jeor formula to calculate your TDEE and then adds or subtracts a calorie adjustment based on your goal. For weight loss, it applies a moderate deficit; for weight gain, a surplus. A macronutrient breakdown (protein, carbohydrates, and fat) is also provided as a starting guideline.
All calculations run locally in your browser with complete privacy. No personal health data is transmitted to any server, making this a safe tool for anyone monitoring their nutrition privately.
Key Features of Calorie Calculator
- Calculates daily calorie needs using the Mifflin-St Jeor TDEE formula
- Adjusts calories for weight loss, maintenance, or weight gain goals
- Provides macronutrient breakdown: protein, carbohydrates, and fat
- Supports both metric and imperial unit input
- Works for both male and female biological profiles
- Offers multiple calorie levels (mild, moderate, aggressive) for weight loss
- Instant results as inputs change
- No health data stored or transmitted
Examples
Daily calories for weight loss
Find the recommended daily calories for a moderately active woman wanting to lose weight.
Input
Female, 35 years, 75 kg, 168 cm, Moderately active, Goal: Lose weight
Output
Maintenance: 2,170 kcal | Weight loss target: 1,670 kcal
Calories for muscle gain
Estimate calorie surplus needed for a man trying to build muscle.
Input
Male, 25 years, 70 kg, 175 cm, Active, Goal: Gain weight
Output
Maintenance: 2,850 kcal | Gain target: 3,100 kcal
Common Use Cases
- Setting a daily calorie goal at the start of a diet or fitness plan
- Adjusting calorie intake after changing your activity level
- Understanding macronutrient targets alongside calorie goals
- Planning calorie intake for gradual vs aggressive weight loss
- Tracking whether current food intake aligns with maintenance needs
- Educating clients on personalized calorie needs in health coaching
Troubleshooting
Treating the calorie target as exact rather than a starting estimate
Solution
Calorie needs vary individually. Start with the estimate, track your weight for 2-3 weeks, and adjust by 100-200 kcal if results do not match expectations.
Setting too aggressive a deficit
Solution
Very large deficits (more than 1000 kcal/day) can lead to muscle loss and nutritional deficiencies. A moderate deficit of 300-500 kcal/day is safer and more sustainable.
Ignoring activity level accuracy
Solution
Activity level is the biggest variable in the calculation. Honestly assess how active you are — most desk workers with occasional gym sessions fall into "Lightly active," not "Moderately active."
Frequently Asked Questions
How many calories should I eat to lose weight?
A deficit of 500 kcal/day below your TDEE leads to approximately 0.5 kg (1 lb) of weight loss per week. This is a commonly recommended rate for sustainable fat loss without excessive muscle loss.
What is a macro breakdown?
Macronutrient breakdown shows the recommended grams of protein, carbohydrates, and fat based on your daily calorie target. Common splits are 30% protein, 40% carbs, 30% fat for balanced diets.
How accurate is this calculator?
The calculator provides a statistical estimate based on population averages. Individual metabolic variation means actual needs may differ by 10-20%. Use it as a starting point and adjust based on real results.
What activity level should I choose?
Sedentary: desk job, no exercise. Lightly active: 1-3 days/week light exercise. Moderately active: 3-5 days/week moderate exercise. Very active: 6-7 days/week hard exercise. Extra active: physical job plus hard training.
Should I eat below my BMR?
Generally no. Eating below BMR deprives your body of the calories needed for basic metabolic functions and can slow metabolism, cause nutrient deficiencies, and lead to muscle loss.
How many calories to build muscle?
A surplus of 200-300 kcal/day above TDEE with adequate protein intake (1.6-2.2 g/kg body weight) supports muscle growth while minimizing excess fat gain.
Does the calculator account for age-related metabolic changes?
Yes. Age is one of the inputs in the Mifflin-St Jeor formula. As age increases, the calculated BMR decreases slightly to reflect the natural reduction in metabolic rate with aging.
Is my health data private?
Yes. All calculations run entirely in your browser. Your weight, height, and health goals are never transmitted to or stored on any server.