Burn Severity Estimator
This calculator demonstrates the "Rule of Nines," a method used by medical professionals to quickly estimate the Total Body Surface Area (TBSA) percentage affected by second and third-degree burns in adults. [1]
How It Works:The adult body is divided into regions, with surface area values assigned in multiples of nine. The TBSA is a critical factor in guiding treatment decisions, such as the amount of intravenous fluid resuscitation required. [2]
How to Use:Check the boxes corresponding to all burned areas on an adult body. The calculator will sum the percentages to provide an estimated TBSA. This tool is for adults only; children require a different assessment method (like the Lund-Browder chart) due to their different body proportions.
- Hettiaratchy, S., & Papini, R. (2004). Initial management of a major burn: II--assessment and resuscitation. British Medical Journal, 329(7457), 101–103. Read More.
- National Center for Biotechnology Information, StatPearls. Rule of Nines. Learn More.
This is an educational tool ONLY. It is NOT for self-diagnosis or for making treatment decisions. All burns are serious injuries that require immediate evaluation by a qualified medical professional. If you or someone else is burned, call emergency services (911) or go to the nearest emergency department immediately.
An educational tool based on the "Rule of Nines" for adult burns.
of body surface affected
This estimation is for informational purposes. All burns require professional medical care. Do not delay seeking help.