Carpet Needed
198 sq ft
Rolls
1
Sq Yards
22.0
Cost
$1,199
180 ft²
198 ft²
1
$1,199
Inputs
Result
180 sq ft = 20 sq yd base. With waste: 22 sq yd carpet and padding. Total cost: $693 carpet + $110 padding + $396 installation = $1,199 total project.
Inputs
Result
360 sq ft = 40 sq yd base. With waste: 46 sq yd. Room width exceeds roll, requires seam. Total: $1,656 carpet + $276 padding + $1,035 installation = $2,967 total.
Inputs
Result
Total 300 sq ft = 33.3 sq yd base. With waste: 38.3 sq yd. Total cost: $1,294 carpet + $192 padding + $690 installation = $2,176 total project.
Measure the length and width of each room in feet, multiply to get square footage, then divide by 9 to convert to square yards (the standard unit for carpet sales). Add 10-20% waste factor for cuts and seams. For rooms wider than the carpet roll (typically 12 or 15 feet), you'll need to plan for seams.
Standard carpet rolls come in two widths: 12 feet and 15 feet. The 12-foot width is most common for residential installations. Choose the roll width that minimizes seams and waste for your room dimensions. For rooms wider than the roll, multiple strips will need to be seamed together.
Include 10% waste for simple rectangular rooms, 15% for rooms with closets or alcoves, and 20% for rooms with irregular shapes or multiple angles. The waste factor accounts for cuts, seams, pattern matching, and fitting around obstacles like doorways and built-ins.
Choose padding thickness between 6-12mm based on use: 6mm for commercial areas, 8mm for standard residential (recommended), 10mm for premium comfort, and 12mm for maximum luxury. Thicker padding provides better comfort and sound absorption but costs more. Quality padding extends carpet life by 50% or more.
| Padding Type | Thickness | Cost/sq ft | Best For |
|---|---|---|---|
| Rebond (standard) | 6–8mm | $0.40–$0.80 | Most residential rooms |
| Memory foam | 8–10mm | $1.00–$1.50 | Bedrooms, living rooms |
| Moisture barrier | 6–8mm | $0.75–$1.25 | Basements, below grade |
| Fiber (felt) | 8–12mm | $0.80–$1.20 | Berber and commercial carpet |
Professional carpet installation typically costs $1-3 per square foot, depending on room complexity, furniture moving, and old carpet removal. Total project cost includes carpet ($2-6/sq ft), padding ($0.50-1.50/sq ft), and installation. Complex layouts with stairs or many seams cost more to install.
No, avoid placing seams in high-traffic areas like hallways and doorways. Plan seams in low-traffic zones where they'll be less visible and experience less wear. Seams should run parallel to the dominant traffic pattern and be placed where furniture will cover them when possible.
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Last Updated: Mar 9, 2026
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