Square Footage

Area for rectangle, triangle, trapezoid, circle.

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Formula and source

Area = length × width (rectangle) and triangle / circle / sector for non-rectangular plans.

Classical geometry; IRC 2021 / IBC 2021 occupancy area definitions.

Audience

This tile is built for carpentry and the adjacent professions in the Carpentry and Construction group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

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Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.