Surgery

Wallace Rule of Nines (TBSA) Calculator

Total body surface area estimation for burn patients using anatomical region percentages

Calculate Rule of Nines

Child Burn Chart

Head Burn Extent

Anterior Trunk Burn Extent

Posterior Trunk Burn Extent

Left Arm Burn Extent

Right Arm Burn Extent

Left Leg Burn Extent

Right Leg Burn Extent

Perineum Burn Extent

Clinical use

Use this calculator for total body surface area estimation for burn patients using anatomical region percentages in thesurgery workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.

Interpretation

Adult: head 9%, each arm 9%, anterior trunk 18%, posterior trunk 18%, each leg 18%, perineum 1%. Pediatric: head 18%, each leg 14%. Use with Parkland formula for fluid resuscitation.

Required inputs

Is Child
Head
Chest Anterior
Chest Posterior
Left Arm
Right Arm
Left Leg
Right Leg
Perineum

Evidence and limitations

This page cites 2 published references. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.

References

Wallace AB. The exposure treatment of burns. Lancet 1951;1(6653):501-504
American Burn Association. Burn Center Referral Criteria. J Burn Care Res 2016

Frequently asked questions

What is the Wallace Rule of Nines (TBSA)?

Wallace Rule of Nines (TBSA) is a clinical calculator used for Total body surface area estimation for burn patients using anatomical region percentages.

How do I interpret the Wallace Rule of Nines (TBSA)?

Adult: head 9%, each arm 9%, anterior trunk 18%, posterior trunk 18%, each leg 18%, perineum 1%. Pediatric: head 18%, each leg 14%. Use with Parkland formula for fluid resuscitation.

What inputs are required for the Wallace Rule of Nines (TBSA)?

Required inputs include Is Child, Head, Chest Anterior, Chest Posterior, Left Arm, Right Arm, Left Leg, Right Leg, Perineum.

What is the evidence behind the Wallace Rule of Nines (TBSA)?

The Wallace Rule of Nines (TBSA) page cites Wallace AB. The exposure treatment of burns. Lancet 1951;1(6653):501-504; American Burn Association. Burn Center Referral Criteria. J Burn Care Res 2016.