The rule of nines is a quick estimation method to find out the percentage of the burned surface area. According to this rule the body is divided into following sections: 1. 9% for head and neck 2. 9% for chest 3. 9% for upper back 4. 9% for right arm 5. 9% for left arm 6. 9% for abdomen 7. 9% for lower back 8. 18% for right leg 9. 18% for left leg 10. 1% for perineum Picture credit: https://dermatology.co.za/patient-area/skin-burn-treatment/