Daily Calorie Calculator
Estimate your maintenance calories and get a daily target for fat loss, maintenance, or muscle gain.
What is a daily calorie calculator?
A daily calorie calculator helps you estimate how many calories your body needs each day based on your age, sex, height, weight, and activity level. It gives you a practical starting point for nutrition planning whether your goal is weight loss, maintenance, or muscle gain.
This page uses a proven method (Mifflin-St Jeor equation) to estimate your basal metabolic rate (BMR), then adjusts for activity to estimate your total daily energy expenditure (TDEE). Finally, it applies a calorie adjustment based on your goal.
How the calculator works
1) Estimate BMR (Basal Metabolic Rate)
BMR is the number of calories your body needs at complete rest to maintain basic functions like breathing, circulation, and cell repair.
- Men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
- Women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161
2) Apply activity multiplier
Your BMR is multiplied by an activity factor to estimate maintenance calories (TDEE). The better your activity estimate, the more accurate your starting target.
- Sedentary: 1.2
- Lightly active: 1.375
- Moderately active: 1.55
- Very active: 1.725
- Extra active: 1.9
3) Adjust for your goal
To lose fat, eat below maintenance. To gain muscle, eat above maintenance. Most people do best with moderate adjustments they can sustain consistently.
How to use your calorie number in real life
Start with consistency, not perfection
Hit your calorie target within a reasonable range (about ±100 calories). Consistency over weeks matters much more than one perfect day.
Watch weekly trends
Scale weight fluctuates due to water, sodium, stress, and digestion. Track your morning weight 3–7 times per week and use the weekly average. Then evaluate trend direction every 2–3 weeks.
Adjust in small steps
If progress is too slow, adjust by 100–200 calories per day. Large cuts are usually hard to maintain and may reduce training performance and recovery.
Macro guidance (protein, carbs, fat)
The calculator also gives a simple macro starting point:
- Protein: Higher when dieting to preserve muscle.
- Fat: Set a healthy minimum for hormones and satiety.
- Carbs: Fill the remaining calories to support energy and training.
Macros are flexible. Food quality, meal timing, fiber intake, and sleep quality all influence how well your plan works.
Common mistakes to avoid
- Choosing an activity level that is too high.
- Ignoring weekend calories or liquid calories.
- Changing calories every few days before trends are clear.
- Trying overly aggressive deficits for too long.
Who should be cautious?
If you are pregnant, breastfeeding, under 18, managing diabetes, recovering from an eating disorder, or dealing with a medical condition, consult a qualified clinician before following a calorie target. This calculator is educational and not a diagnosis or treatment tool.
Bottom line
A daily calorie calculator gives you a strong starting estimate. Pair it with consistent tracking, strength training, adequate protein, and 7–9 hours of sleep. Then refine your target based on real-world progress. That combination is what drives reliable, long-term results.