TDEE Calculator

Basal metabolic rate describes energy burned at complete rest — essentially what the body would use lying still all day doing nothing — which is a useful intermediate figure but not, on its own, a realistic baseline for setting a calorie target, since almost nobody is actually at complete rest for 24 hours. Total daily energy expenditure takes that BMR figure and adds everything else the body actually does across a real day: digestion, incidental movement, deliberate exercise, and simply maintaining posture and normal daily activity. A calorie deficit or surplus is only meaningful relative to this fuller, more realistic TDEE figure — comparing intake against BMR alone would systematically overstate how large a deficit someone is actually running, since it ignores all the calories a normal day of activity burns on top of resting metabolism.

The activity categories span from sedentary through light, moderate, active and very active, and the honest classification for most people with a desk job who exercise a handful of times a week lands at moderate rather than the higher categories people often reach for — "active" and "very active" are generally intended for people whose entire daily routine involves substantial physical movement, such as physically demanding jobs combined with regular structured exercise, not simply attending the gym three or four times weekly on top of an otherwise sedentary day. This preset defaults to moderate specifically because it is the more statistically common honest fit, while still remaining fully adjustable for anyone whose actual daily activity level genuinely differs from that baseline.