Daily calorie target based on your stats, activity level, and weight goal.
We compute your Basal Metabolic Rate (BMR) via the Mifflin-St Jeor equation, multiply by your activity factor to get Total Daily Energy Expenditure (TDEE), then add or subtract your chosen goal adjustment. ~7,700 kcal = 1 kg of body fat, so a 500 kcal/day deficit is roughly half a kilo per week.