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Tool ATool B

Rule of Nines

Dermatology

Estimate total body surface area (TBSA) burned using the Rule of Nines. Head=9%, each arm=9%, each leg=18%, torso=36%. Burns ≥20% TBSA require IV fluid resuscitation with the Parkland formula.

Formula

Head 9% + Each arm 9% + Anterior trunk 18% + Posterior trunk 18% + Each leg 18% + Perineum 1% = 100%

Inputs

FAQs: 3

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Burns BSA

Dermatology

Estimate total body surface area (TBSA) affected by burns using the Rule of Nines. Enter affected areas to calculate total burn percentage. Then use TBSA result in [Parkland Formula](/tools/parkland-formula) for fluid resuscitation.

Formula

Total TBSA (%) = sum of all affected body region percentages. Maximum 100%.

Inputs

Head & Neck (max 9%)
Anterior Trunk (max 18%)
Posterior Trunk (max 18%)
Right Upper Limb (max 9%)
Left Upper Limb (max 9%)
Right Lower Limb (max 18%)
Left Lower Limb (max 18%)
Perineum (max 1%)

FAQs: 3

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Compare Medical Tools

Side-by-side comparison helps you choose the right calculator for a specific clinical question.

Rule of Nines

Dermatology

Estimate total body surface area (TBSA) burned using the Rule of Nines. Head=9%, each arm=9%, each leg=18%, torso=36%. Burns ≥20% TBSA require IV fluid resuscitation with the Parkland formula.

Formula

Head 9% + Each arm 9% + Anterior trunk 18% + Posterior trunk 18% + Each leg 18% + Perineum 1% = 100%

Inputs

FAQs: 3

Open tool

Burns BSA

Dermatology

Formula

Total TBSA (%) = sum of all affected body region percentages. Maximum 100%.

Inputs

Head & Neck (max 9%)
Anterior Trunk (max 18%)
Posterior Trunk (max 18%)
Right Upper Limb (max 9%)
Left Upper Limb (max 9%)
Right Lower Limb (max 18%)
Left Lower Limb (max 18%)
Perineum (max 1%)

FAQs: 3

Open tool