"How many calories should I eat?" is the most common question in fitness and nutrition. The answer is not a flat number like 2,000 calories for everyone. Your daily calorie target is highly individual, determined by your unique body metrics, your daily activity level, and your specific goal (losing fat, gaining muscle, or maintaining weight).
Disclaimer: This guide provides general educational information about calculating calorie targets. It is not medical or nutritional advice.
Step 1: Calculate Your BMR
The foundation of your calorie target is your Basal Metabolic Rate (BMR). This is the absolute minimum number of calories your body needs to survive if you were to lay in bed all day without moving. It accounts for breathing, circulating blood, cellular repair, and brain function.
BMR is calculated using your age, sex, height, and weight. The most widely accepted formula for this is the Mifflin-St Jeor equation. You can find your exact number using our BMR Calculator.
Step 2: Determine Your TDEE
You do not lay in bed all day. You walk to your car, you work, you fidget, you digest food, and you might exercise. All of this movement burns extra calories.
When you add the calories burned from daily activity to your BMR, you get your Total Daily Energy Expenditure (TDEE). This is your "maintenance" number. If you eat this exact number of calories every day, your weight will not change.
The Activity Multipliers
To find TDEE, we multiply BMR by an activity factor:
- Sedentary (x1.2): Desk job, little to no exercise.
- Lightly Active (x1.375): Light exercise/sports 1-3 days/week.
- Moderately Active (x1.55): Moderate exercise/sports 3-5 days/week.
- Very Active (x1.725): Hard exercise/sports 6-7 days a week.
- Extra Active (x1.9): Physical labor job and hard daily exercise.
Step 3: Adjust for Your Goal
Once you know your TDEE maintenance calories, you adjust that number based on your goal:
- To Lose Weight (Cutting): Subtract 300 to 500 calories from your TDEE. This creates a healthy caloric deficit, resulting in approximately 0.5 to 1 pound of fat loss per week.
- To Gain Muscle (Bulking): Add 200 to 300 calories to your TDEE. This creates a slight caloric surplus, providing your body the extra energy it needs to synthesize new muscle tissue without gaining excessive fat.
- To Maintain Weight: Eat exactly your TDEE. This is also a good target if your primary goal is "body recomposition" (slowly building muscle while losing fat as a beginner).
Tracking Progress
Calculators provide excellent estimations, but human metabolisms are dynamic. The final step is to track your intake and your body weight for a few weeks to see how your body responds to the numbers.
If your goal is to lose weight and the scale hasn't moved in three weeks, your TDEE estimation might be slightly too high, and you may need to reduce your daily intake by another 100-200 calories. Adjust based on real-world data, not just the math formula.