How this calculator works
Calculate carpet quantity from room dimensions, convert it to square yards and include an adjustable waste allowance.
Purchase square feet = room area × (1 + waste). Square yards = square feet ÷ 9.
Example
A 15 × 12 ft room is 180 sq ft or 20 sq yd before waste.
How to get a better estimate
- Seams and roll width can increase the real quantity beyond pure area.
- Patterned carpet may need additional matching allowance.
- Ask the installer to confirm seam layout before ordering.
What the result means
The result is a planning estimate. Dimensions, coverage, density, packaging and installation conditions vary by product and project. For purchasing, compare the result with the exact product label or supplier specification. For structural, electrical, code-regulated or safety-critical work, use an appropriately qualified professional.
Common questions about the Carpet Calculator
What does this calculator estimate?
Calculate carpet quantity from room dimensions, convert it to square yards and include an adjustable waste allowance.
What formula does it use?
Purchase square feet = room area × (1 + waste). Square yards = square feet ÷ 9.
How should I use the result?
Use it as a planning estimate, then verify the dimensions and replace editable defaults with the specifications for the product or service you actually intend to buy.