HAUSE tool · calculator
Slab area calculator
Break the area into rectangles, name each one, and get the surface area in square feet and square metres.
Educational self-check only. Not a diagnosis, inspection, estimate or quote; a site assessment is needed to confirm anything. Results stay in this browser tab until you choose to send them.
Enter length and width
Total surface area
0 ft² · 0 m²
1 ft = 0.3048 m, so 1 ft² = 0.09290304 m². Sections with missing or invalid values are not counted.
Rectangles only — for L-shapes or curves, split into rectangles; the result is an approximation. This is surface area, not the volume of any void underneath, the amount of foam, or a price. Those depend on conditions only a site assessment can measure.
Sending opens the assessment form with this summary attached. You can edit or remove it there; nothing is sent until you submit the form. No contact details are needed to use this tool.