The BMI & BMR Combined Calculator computes your Body Mass Index (BMI) from weight and height and places it into standard WHO categories, then estimates your Basal Metabolic Rate (BMR) using the Mifflin–St Jeor equation and multiplies it by an activity factor to give a Total Daily Energy Expenditure (TDEE); the tool also provides a suggested daily calorie target for maintaining, losing, or gaining weight (with an optional custom calorie adjustment), plus an explanation of the formula used — use it as a practical planning guide, but consult a healthcare or nutrition professional for personalized medical or diet advice.