Calculate your Basal Metabolic Rate — the calories your body burns at complete rest.
| Mifflin-St Jeor (recommended) | — |
| Harris-Benedict (revised) | — |
| Katch-McArdle (if body fat known) | Requires body fat % |
Basal Metabolic Rate is the number of calories your body needs to maintain basic physiological functions (breathing, circulation, cell production) while at complete rest. It accounts for 60–75% of total daily calorie expenditure.