TDEE (Total Daily Energy Expenditure) is the total number of calories you burn each day, including all activities and bodily functions.

TDEE is calculated by multiplying your Basal Metabolic Rate (BMR) by an activity multiplier based on your lifestyle.

The Mifflin-St Jeor equation is commonly used for BMR, then multiplied by an activity factor to get TDEE.

Knowing your TDEE helps you set calorie targets for weight loss, maintenance, or muscle gain.

To lose weight, eat fewer calories than your TDEE. A deficit of 500 calories per day is a common starting point.

Recalculate your TDEE whenever your weight, activity level, or fitness goals change.