About this tool
The Calorie Calculator is a free online tool that estimates how many calories your body needs every day to reach your weight goal - whether that means losing fat, maintaining your current weight, or building muscle. It combines the clinically validated Mifflin-St Jeor equation with your personal activity level to give you a realistic, science-based daily calorie target. Unlike generic online calculators that only output a single number, this tool also generates a full macro breakdown (protein, fats, carbohydrates in grams) and a personalized 7-day regional meal plan tailored to your cuisine and dietary restrictions.
How it works
1
Enter your body metrics
Provide your gender, age, height, and weight. You can switch between metric (cm/kg) and imperial (in/lbs) at any time - the calculator converts values instantly.
2
Choose your activity level
Select how active you are on a typical week: sedentary (desk job), lightly active (1-3 workouts/week), moderately active (3-5 workouts/week), or very active (6-7 workouts/week).
3
Set your goal and pace
Pick your primary goal - fat loss, maintenance, or muscle gain - and how aggressive you want the deficit or surplus to be. Standard pace (+/- 500 kcal) is a good balance between speed and sustainability.
4
Get your personalized plan
You will see your BMR, TDEE, target calories, water intake, and full macro breakdown in grams. Below, you get a 7-day regional meal plan you can print or save as PDF.
Frequently Asked Questions
How accurate is this calorie calculator? v
It uses the Mifflin-St Jeor equation, which is accurate within +/- 200 calories for about 85% of healthy adults. Real metabolic rates vary by 5-15% between individuals, so use the result as a starting point and adjust after 2-3 weeks of tracking.
What is the difference between BMR and TDEE? v
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest just to stay alive - breathing, circulating blood, maintaining temperature. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor and represents the total calories you burn in a day including all movement and exercise.
How many calories do I need to lose 1 kg per week? v
One kilogram of body fat stores approximately 7,700 calories. To lose 1 kg per week, you would need a deficit of 1,100 calories per day - which is aggressive and generally not recommended. A safer target is 0.5 kg per week, which requires a deficit of ~500 calories per day.
Why does the calculator ask for my activity level? v
Two people with identical body metrics can have very different calorie needs depending on how much they move. A construction worker burns hundreds of calories more per day than an office worker of the same age and weight. The activity multiplier captures this difference.
Is this calculator free to use? v
Yes, completely free. No signup, no email required, no hidden fees. The tool runs entirely in your browser - your data never leaves your device.
Can I use this for medical purposes? v
This calculator is for educational and informational purposes only. It is not a substitute for professional medical advice. If you are pregnant, breastfeeding, managing a chronic condition, or under 18, consult a healthcare provider before making significant dietary changes.
How much water should I drink per day? v
Our calculator uses a common guideline of 33 ml per kilogram of body weight (0.5 fl oz per pound). This is a baseline - increase intake during hot weather, intense exercise, illness, or pregnancy. Thirst and urine color (pale yellow) are good real-time indicators.