Carpet Seam Placement Calculator
Calculate optimal carpet seam placement, number of pieces needed, and total waste when installing carpet in a room using standard carpet roll widths.
Formulas Used
Number of Strips: strips = ⌈ cross_direction / roll_width ⌉
Cut Length per Strip (no pattern): cut_length = run_direction
Cut Length per Strip (with pattern repeat R ft): cut_length = ⌈ run_direction / R ⌉ × R
Order Length per Strip: order_length = cut_length × (1 + waste% / 100)
Total Roll Length: total_linear_ft = order_length × strips
Total Area Ordered: total_sq_ft = total_linear_ft × roll_width
Seam Positions: seam_i = i × roll_width for i = 1 … (strips − 1)
Waste %: waste = (ordered_area − room_area) / ordered_area × 100
Assumptions & References
- Reference: Carpet & Rug Institute — Carpet Installation Standard CRI 104 (2021).