##  [Rule of Nines](/index.php/rule-nines) 

  ##  [Rule of Nines](https://health.quantumdictionary.io/rule-nines-0) 

  

 [![Health & Life Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Health%20%26%20Life%20Sciences.png.webp?itok=yyyaiQOY)](/index.php/topic-specific-dictionaries/health-life-sciences)



**Health & Life Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A rapid method to estimate percentage total body surface area (%TBSA) burned in adults by assigning approximate nine‑percent increments to major body regions (common adult allocation: head 9%, each arm 9%, each leg 18%, anterior trunk 18%, posterior trunk 18%, perineum 1%), intended for triage and initial resuscitation calculations.