TDEE calculator

TDEE is total daily energy expenditure: what you burn in a normal day, including activity. The Mifflin-St Jeor equation behind this estimate was fitted on adults, so treat the number as unreliable for children, and treat all of it as a starting point rather than medical advice. Athletes with much more muscle than average burn more than the formula predicts; the activity table shows how much the multiplier alone moves the answer, which is usually bigger than any precision debate.