Area · Multi-shape workbench

Measure every shape. Subtract every opening.

Build a room, floor, wall, yard, or finish-area total from multiple shapes and turn it into an allowance- and price-ready result.

Measurement units
RectangleLength × width
CircleMeasure diameter edge to edge
TriangleBase × perpendicular height ÷ 2
Add area 1
Subtract area 2

Transparent calculation

Add rectangles, circles, and triangles. Subtract exclusions. Apply waste once.

Each line is calculated independently in square feet. Subtracted lines reduce the measured total, then the selected allowance and price are applied to the remaining net area.

Open the verified methodology for formula provenance, assumptions, a worked example, and limitations.