Find out how many calories you burn per day, including activity.
TDEE (Total Daily Energy Expenditure) uses the Mifflin-St Jeor equation, widely regarded as one of the more accurate BMR formulas, then scales it by your activity level to estimate daily maintenance calories.
Total Daily Energy Expenditure — total calories burned daily, including BMR plus activity.
BMR multiplied by an activity multiplier reflecting typical daily activity level.
Eating below TDEE creates a deficit for loss; above creates a surplus for gain.