| Category | BMI range (kg/m2) | BMI Prime |
|---|---|---|
| Very severely underweight | less than 15 | less than 0.60 |
| Severely underweight | from 15.0 to 16.0 | from 0.60 to 0.64 |
| Underweight | from 16.0 to 18.5 | from 0.64 to 0.74 |
| Normal (healthy weight) | from 18.5 to 25 | from 0.74 to 1.0 |
| Overweight | from 25 to 30 | from 1.0 to 1.2 |
| Obese Class I (Moderately obese) | from 30 to 35 | from 1.2 to 1.4 |
| Obese Class II (Severely obese) | from 35 to 40 | from 1.4 to 1.6 |
| Obese Class III (Very severely obese) | over 40 | over 1.6 |