BMR Calculator

Basal Metabolic Rate using Mifflin–St Jeor, Revised Harris–Benedict, or Katch–McArdle (requires body fat %). Includes TDEE by activity.

Units

Sex

Age

Weight (kg)

Height (cm)

Body Fat % (optional) Needed only for Katch–McArdle.

Formula

Activity Level (for TDEE)

Rounding

BMR by Formula (for your inputs)

Formula	BMR (kcal/day)	Notes

Mifflin–St Jeor is widely recommended for adults. Harris–Benedict is an older alternative. Katch–McArdle uses lean body mass from body fat %.