The BMR formula uses the variables of height, weight, age and gender to calculate the Basal Metabolic Rate (BMR). This is more accurate than calculating calorie needs based on body weight alone. The only factor it omits is lean body mass and thus the ratio of muscle-to-fat a body has. Remember, leaner bodies need more calories than less lean ones. Therefore, this equation will be very accurate in all but the very muscular (in which it will underestimate calorie needs) and the very fat (in which it will over-estimate calorie needs).
Activity Level |
Exercise / Sports |
|---|---|
| Sedentary | Little to no exercise |
| Lightly Active | 1-3 days/week |
| Moderately Active | 3-5 days/week |
| Very Active | 6-7 days/week |
| Extremely Active | Very physical job or 2x training |