Daily Calorie Calculator: Find Your Personal Calorie Needs
One of the most common questions in nutrition is: "How many calories should I eat per day?" The answer isn't one-size-fits-all — it depends on your age, sex, weight, height, and how active you are. Our free Calorie Calculator does the math for you and gives you a personalized daily calorie target based on your goal — whether that's losing weight, maintaining, or building muscle.
Enter your details and get your BMR, TDEE, and recommended intake for your specific goal in seconds.
Two Numbers You Need to Know: BMR and TDEE
BMR — Basal Metabolic Rate
Your BMR is the number of calories your body burns at complete rest — just to keep you alive (breathing, heart beating, maintaining body temperature). Think of it as your body's "idle" energy consumption.TDEE — Total Daily Energy Expenditure
TDEE is your BMR multiplied by an activity factor. It's how many calories you actually burn in a day when you account for movement, exercise, and daily activity. This is the number you should use for planning your diet.TDEE = BMR × Activity Multiplier
Activity Level Multipliers Explained
| Activity Level | Description | Multiplier | |---------------|-------------|------------| | Sedentary | Desk job, little to no exercise | × 1.2 | | Lightly Active | Light exercise 1–3 days/week | × 1.375 | | Moderately Active | Moderate exercise 3–5 days/week | × 1.55 | | Very Active | Hard exercise 6–7 days/week | × 1.725 | | Extra Active | Physical job + daily training | × 1.9 |
Most people overestimate their activity level. If you sit at a desk most of the day and exercise 3 times a week, you're likely "Lightly Active" to "Moderately Active" — not "Very Active."
Calorie Targets Based on Your Goal
Once you have your TDEE from the Calorie Calculator, here's how to adjust it:
To Lose Weight (Fat Loss)
Eat 300–500 calories below your TDEE per day. This creates a deficit that leads to roughly 0.3–0.5 kg (0.5–1 lb) of fat loss per week — a safe and sustainable rate.Avoid eating less than 1,200 calories/day (women) or 1,500 calories/day (men) without medical supervision.
To Maintain Weight
Eat at your TDEE. Your weight stays stable when calories in = calories out.To Build Muscle (Lean Bulk)
Eat 250–500 calories above your TDEE. Combined with strength training, this gives your body the energy surplus needed to build muscle without excessive fat gain.Calorie Needs by Age Group (General Estimates)
| Age Group | Sedentary Women | Sedentary Men | |-----------|-----------------|----------------| | 19–30 | 1,800–2,000 kcal | 2,400–2,600 kcal | | 31–50 | 1,800 kcal | 2,200–2,400 kcal | | 51–70 | 1,600 kcal | 2,000–2,200 kcal | | 71+ | 1,600 kcal | 2,000 kcal |
These are estimates for sedentary individuals. Active people need significantly more.
Macronutrients: Where Those Calories Come From
Calories come from three macronutrients (macros):
| Macro | Calories Per Gram | Role | |-------|------------------|------| | Protein | 4 kcal/g | Muscle repair, satiety, immune function | | Carbohydrates | 4 kcal/g | Primary energy source, brain fuel | | Fat | 9 kcal/g | Hormones, vitamin absorption, cell function |
General macro split for most people:
- Protein: 25–35% of total calories
- Carbohydrates: 35–50% of total calories
- Fat: 20–35% of total calories
Athletes and people focused on muscle building typically increase protein to 30–40% of calories.
Why Calorie Counting Isn't Perfect (But Still Useful)
Calorie counts on food labels can be off by up to 20%. Your body's actual calorie burn varies day to day. And not all calories affect hunger and energy the same way — 200 calories from chicken and vegetables behaves very differently from 200 calories from candy.
Use the calorie target as a starting guide, not a rigid rule. If you're not seeing results after 2–3 weeks, adjust by 100–200 calories and reassess.
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FAQ — Calorie Calculator
How accurate is the calorie calculator? The calculator uses the Mifflin-St Jeor equation, which is considered the most accurate formula for estimating BMR in the general population. Studies show it's accurate within 10% for most people. Real-world variation exists because individual metabolism, gut microbiome, and hormones all play a role.
Do I need to count calories to lose weight? Not necessarily. Many people lose weight successfully without counting by eating whole foods, managing hunger with protein and fiber, and being mindful of portion sizes. However, tracking calories — even for just a few weeks — is one of the most effective ways to understand your eating patterns and identify where excess calories are coming from.
How many calories should I eat to lose 1 kg per week? One kilogram of body fat contains roughly 7,700 calories. To lose 1 kg per week, you'd need a daily deficit of about 1,100 calories. For most people, this is aggressive and difficult to sustain. A more realistic target is 0.5 kg per week, which requires a 550-calorie daily deficit.
Does the calculator work for teenagers? The Mifflin-St Jeor equation is validated for adults 18 and older. Teenagers have different nutritional needs due to growth and development. For under-18s, please consult a pediatric nutritionist rather than using adult calorie calculators.