How this calculator works
Calculate carpet quantity from room dimensions, convert it to square yards and include an adjustable waste allowance.
Formula
The calculator lays full-width carpet strips in both directions, adds cut trim and pattern alignment, then uses the selected or lower-material orientation. Square yards = roll width × total linear feet ÷ 9.
The calculator lays full-width carpet strips in both directions, adds cut trim and pattern alignment, then uses the selected or lower-material orientation. Square yards = roll width × total linear feet ÷ 9.
Example
A 15 × 12 ft room is 180 sq ft or 20 sq yd before waste.
Reliability check
Compare both roll directions, then reject any direction that places seams in poor locations or reverses the pile. The least-material layout is not automatically the correct installation layout.
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
This calculator estimates area, not a professional roll-layout plan. Standard roll width, pile direction, seams, stairs and pattern matching can increase the quantity beyond the square-yard result.