zacdaddytools
Add multiple room sections together and allow extra for cuts and fitting.
Divide an awkward room into rectangles, then add every section together.
Allow extra for cuts, joins and fitting.
1 measured area
Total including 10% extra
13.20 m²
Approximately 142.08 ft²
This is an area estimate. Carpet roll width, seams, pattern matching and room shape can change the amount needed, so confirm the final quantity with your fitter or supplier.
For a rectangular room, enter its length and width. For an L-shaped room, alcove or connected space, divide the floor plan into separate rectangles and add each one as a room section. Give the sections useful names so the copied summary is easy to check later.
Choose metres or feet before entering measurements. Switching units converts the dimensions already entered and displays the final requirement in both square metres and square feet.
Each rectangular section uses length × width. The measured areas are added together, then the selected waste percentage is applied to the combined total. Waste allows for cuts, joins, pattern matching and fitting errors; the appropriate amount depends on the room and the carpet.
Main section: 4 m × 3 m = 12 m².
Alcove: 2 m × 1.5 m = 3 m².
Measured total: 15 m². With 10% waste: 16.5 m² required.
This result estimates floor area, not the exact roll width, seam layout or direction needed for installation. Carpet is commonly supplied in fixed widths, so a fitter may need more material than the area alone suggests. Measure at the widest points, include door recesses where appropriate and confirm the final cutting plan with your supplier or installer.
FAQs
Split it into two non-overlapping rectangles, enter the length and width of each, and let the calculator combine their areas.
The tool offers 0%, 5%, 10% and 15% presets plus a custom value. The right allowance depends on cuts, roll width, pattern and fitting plan.
No. It calculates total area. Fixed roll widths and seam placement can change the quantity that must be purchased.
Yes. Select feet to enter dimensions in feet and receive square-foot results, with the converted square-metre total also shown.