Carpet Installation Cost Calculator (2026)

Common mistakes & questions

• Pad matters more than carpet — a cheap pad shortens the life of any carpet by years.
• Stairs are charged per step, not per sq ft — figure roughly $25-$45 each.
• Berber and pattern carpets need extra waste factor (15-20%) for seam matching.
• Olefin is the only good basement choice (mold-resistant); nylon and wool can mildew.
• Old tack strip should be inspected and replaced — bent strips snag the new carpet.

FAQ

How much does carpet cost per square foot installed in 2026?

Mid-grade nylon carpet runs $4-$6 per sq ft installed including pad. Polyester $3-$5, wool $9-$15, triexta $5-$8.

Should I replace the pad?

Yes. Most carpet warranties are voided if you reuse old pad. A good 8 lb pad is $0.55-$0.90 per sq ft and adds years to the carpet.

Can I install carpet myself?

For a single small room with no seams, possible. Anything with seams or stairs really wants a power-stretcher and seam iron — skill-dependent. Most DIYers do the demo and let a pro install.

Cost factors

• Carpet fiber and grade. Polyester is cheapest, nylon is the durability sweet spot, wool is the premium option. Within each fiber, budget/mid/premium grades vary by 2-3x.
• Pad density. Pads run from $0.40 to $1.85 per sq ft. Cheap pads void most carpet warranties and shorten useful life by years.
• Stairs. Stairs are billed per step ($25-$45 each), not per sq ft. A 14-step staircase adds $350-$630.
• Demo and disposal. Old carpet tear-out is $0.40-$0.85/sf; tile or hardwood is $1.20-$2.10/sf and requires more disposal.
• Subfloor repair. Loose tack strip, squeaks, or moisture damage extends the job. Budget $1-$3/sf if repairs are needed.

What's included

• Carpet, pad, and tack strip
• Standard install labor (stretching, seaming)
• Power-stretcher and seam-iron equipment
• Trade minimum and trip charge

What's not included

• Subfloor leveling beyond minor patch
• Asbestos abatement on pre-1978 floors
• Furniture disassembly (only flat-move included)
• Custom inset borders or motifs
• Stair runners on open or rounded staircases (priced separately)

Good-quote checklist

• Confirm carpet brand, fiber, and exact grade (not just "mid")
• Confirm pad weight (lb) and whether moisture-barrier is included
• Confirm stair count and per-step price
• Confirm haul-off/disposal of old carpet is in the quote
• Confirm warranty (mfr + installer separately)
• Confirm move-furniture scope (room-by-room or whole house)

More questions