Carpet Roll & Padding Estimator calculates broadloom carpet square yardage, 12-foot and 15-foot roll linear cut requirements, seam allowances, and underlayment cushion rolls for residential and commercial flooring installations.

### Broadloom Carpet Geometry and Seaming Rules - **Area Calculation:** Room length in feet multiplied by room width in feet yields square footage. Dividing square feet by 9 converts the area to standard carpet square yards. - **Roll Width and Seam Drops:** Standard broadloom rolls come in 12-foot or 15-foot widths. When a room exceeds the roll width, installers must run multiple parallel strips, creating longitudinal seams that require extra linear yardage. - **Waste Factor:** A 10% to 15% allowance accounts for seaming drops, pattern matching on patterned pile carpets, and perimeter trimming along baseboards. - **Padding Underlayment:** Standard cushion padding rolls cover 30 square yards (270 square feet). Dividing total room square footage by 270 identifies the required padding roll count.

### Worked Numeric Example Consider an 18 ft × 14 ft living room using standard 12 ft broadloom carpet with a 10% waste allowance: - **Room Net Area:** $18 \times 14 = 252\text{ sq ft} = 28.0\text{ sq yds}$. - **Strip Count:** Since room width ($14\text{ ft}$) exceeds roll width ($12\text{ ft}$), 2 parallel strips are required. - **Linear Footage Required:** $2 \times 18\text{ ft} \times (1 + 0.10) = 36 \times 1.10 = 39.6\text{ linear ft}$ of 12 ft broadloom. - **Carpet to Order:** $(39.6 \times 12) / 9 = 52.8\text{ sq yds}$ (order rounded up to **53 sq yds** to accommodate cross-seams). - **Padding Rolls:** $\lceil 252 / 270 \rceil = 1\text{ roll}$ of 30 sq yd carpet underlayment cushion.

### Client-Side Processing Note All flooring dimensions and cut calculations execute entirely inside your local browser. No room layouts or project estimates are stored or sent to remote servers.