Total Body Surface Area- Rule of Nines
| ANATOMIC STRUCTURE | ADULT | CHILD |
| Anterior head | 4.5% | 8.5% |
| Posterior head | 4.5% | 8.5% |
| Anterior torso | 18% | 18% |
| Posterior torso | 18% | 18% |
| Each Anterior Leg | 9% | 6.5% |
| Each Posterior Leg | 9% | 6.5% |
| Each Anterior Arm | 4.5% | 4.5% |
| Each Posterior Arm | 4.5% | 4.5% |
| Genitalia/Perineum | 1% | 1% |
| ANATOMIC STRUCTURE | ADULT, OBESE & >80 kg | INFANTS <10 kg |
| Head & Neck | 2% | 20% |
| Anterior Torso | 25% | 16% |
| Posterior Torso | 25% | 16% |
| Each Leg | 20% | 16% |
| Each Arm | 5% | 8% |
| Genitalia/Perineum | 0% | 1% |
| (1) O'Sullivan SB, Schmitz TJ. Phys Rehabilitation 5th ed. FA Davis Co., Philadelphia. 2007. p. 1098, Fig 27.9 | ||