Enter wound length and width to get the surface area instantly — in cm² and in², by the elliptical (recommended) or rectangular method. Unit conversion built in.
Elliptical method: area = π × length × width ÷ 4 — the most widely used method in clinical practice.
The elliptical method (area = π × L × W ÷ 4) is the most widely used in clinical practice because most wounds are roughly oval. The rectangular method (L × W) is simpler but overestimates area for oval wounds — use one method consistently so visit-over-visit comparisons stay valid.
Why it matters: change in wound area is the standard way to judge healing. A commonly used benchmark is that a wound should show roughly 40–50% area reduction by week four; less than that suggests the treatment plan should be reassessed.
Measure the longest length and the widest width perpendicular to it. For the elliptical method (most widely used in clinics), area = π × length × width ÷ 4. For the rectangular method, area = length × width.
The elliptical method is the most widely used in clinical practice because most wounds are roughly oval. The rectangular method overestimates area for oval wounds.
Multiply inches by 2.54 to get centimeters. This calculator converts automatically — just pick your unit.
Change in wound area is the standard way to judge healing. A wound that has not reduced in area by roughly 40–50% at four weeks may need its treatment plan reassessed.
Reviva tracks wound area automatically visit-over-visit — with healing trajectory charts that flag stalled wounds, no spreadsheets required.
See Reviva