Burn Surface Area Estimation
The Lund & Browder Chart Calculator estimates total body surface area (TBSA) burned using an interactive body map, applying age-specific percentages per body region rather than the fixed adult percentages used by the Rule of Nines. The clinician selects an age group (Infant, Child, or Adult) and taps the burned regions on the body map, optionally marking each region as fully, half, or quarter burned; the tool sums the contributions to a total %TBSA. This age-adjusted approach is intended to be more accurate than the Rule of Nines in children, whose head and limb proportions differ from adults'.
It uses age-specific percentages per body region, varying head and leg percentages for Infant, Child, and Adult, instead of the Rule of Nines' fixed adult percentages, which the app notes is less accurate in children.
Yes — after selecting a region, you can choose Full, Half, or Quarter involvement, and the calculator multiplies the region's base percentage by that fraction when totaling TBSA.
In this tool, the head is 19% of TBSA for the Infant age group, 18% for Child, and 9% for Adult, reflecting the proportionally larger head size in young children.
The app labels total TBSA under 10% as Minor Burn, 10% to under 20% as Moderate Burn, 20% to under 40% as Major Burn, and 40% or more as Critical Burn.
No — this screen only calculates %TBSA. The app's separate Parkland Formula calculator uses that TBSA value for fluid resuscitation.