Carpet Calculator

Carpet remains one of the most popular US flooring choices, installed in an estimated 50% of American homes. It offers warmth, comfort, sound insulation, and a wide range of styles and price points. Accurately estimating carpet, padding, and installation costs is essential for budgeting any flooring project.

The calculator above supports 6 carpet types with auto-filled pricing, padding cost, labor cost, roll width selection (12 ft or 15 ft), and seam estimation — giving you a complete cost breakdown before visiting the store.

Convert to square yards with our square yards calculator. Measure room area with our square footage calculator. For other flooring types, see our flooring calculator.

Carpet Types Comparison

Best value: Nylon is the most popular US carpet fiber — it combines durability, stain resistance, and reasonable cost. Triexta (Mohawk SmartStrand) is the newest option, offering built-in stain resistance without chemical treatments.

Step-by-Step Carpet Estimation

Step 1: Measure the Room

Measure wall-to-wall (not baseboard-to-baseboard) since carpet goes under the baseboard. Measure in feet. For complex rooms, break into rectangles and add them together.

Pro tip: Measure at the widest point of each dimension — walls aren't always perfectly straight.

Step 2: Calculate Square Yards

Multiply length × width for square feet. Add waste (10–20%). Divide by 9 to get square yards.

Example: 15 ft × 12 ft = 180 sq ft × 1.10 = 198 sq ft ÷ 9 = 22 sq yd

Step 3: Estimate Total Cost

Add carpet cost + padding cost + labor cost:

• Carpet: 22 sq yd × $30/sq yd = $660
• Padding: 22 sq yd × $4/sq yd = $88
• Labor: 198 sq ft × $1/sq ft = $198
• Total: $946

Seams and Pattern Matching

Carpet comes in 12 ft (standard) or 15 ft (wide) rolls. If your room is wider than the roll width, you'll need a seam:

• Room ≤ 12 ft wide: No seam needed with standard roll
• Room 13–15 ft wide: Choose 15 ft roll (no seam) or accept one seam with 12 ft roll
• Room 16–24 ft wide: One seam minimum with either roll width

Seam placement tips: Place seams in low-traffic areas, never in doorways. Seams should run parallel to the primary light source. With patterned carpet, add 15–20% waste for pattern matching at seams.

Nap direction: All carpet pieces must run in the same nap direction — different directions create visible color differences at seams. Mark the nap direction before cutting.

Carpet Padding Guide

Important: Too thick padding (over ½") can cause carpet to wrinkle and wear unevenly. Most carpet warranties require specific padding density — check your warranty before choosing.

2025 US Carpet Cost Guide

Additional costs to budget: Old carpet removal: $1–$2/sq ft. Furniture moving: $25–$75/room. Stair carpet: $10–$25/step. Transitions/thresholds: $3–$5 per linear foot.