Find how many square yards of carpet your rooms need. Each dimension has its own unit selector (in/ft/yd/m).
Carpet is usually sold by the square yard. Measure each room (length times width, any unit), add them up, then divide by 9 (there are 9 sq ft in a sq yard). Add about 10% for waste, seams and pattern matching. Carpet comes in fixed roll widths, so the purchase may round up to fit the layout.
Use the carpet calculator to estimate square yards from room dimensions and waste. It is designed for planning quantities before you confirm seam layout, roll width and installation details.
Start with the calculator that matches how your material is sold: area, length, volume, count, weight or electrical load. Enter one work area at a time, use the unit selector beside each measurement, then review the order quantity and cost fields before comparing supplier quotes.
Most calculators can save the current estimate in your browser, reload named estimates, print a copy, switch to dark mode or create a shareable link. Those tools are intended for planning and communication; always confirm final quantities, coverage rates, density, code requirements and pricing with the supplier or contractor responsible for the work.