Carpet and Stair Carpet Calculator

Roll layout, seams, pad and stair runs.

Project Details
Enter your measurements and requirements
$
Results
Calculated estimates for your project
Layout2 strips along width
Seams1
Carpet to order28 linear ft (37.3 sq yd)
Pad30 sq yd
Tack strip64 ft
Estimated carpet cost$1,120

Turn these numbers into a build plan.

  • 37.3 sq yd carpet
  • 1 seams
  • 30 sq yd pad
Materials List
Recommended materials and quantities
Carpet37.3 sq yd
Pad30 sq yd

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Project plan · built from your numbers

Carpet a 18 x 14 ft room

28.0 linear ft off a 12 ft roll, 1 seam.

Materials
$1,120
Time
1 weekend
Level
Intermediate
6 steps 5 tools 4 materials
  1. 1

    Remove the old floor

    Pull old carpet, pad and staples, and vacuum the subfloor.

  2. 2

    Fit tack strip

    Nail 64 ft of tack strip around the room, leaving a gap at the wall.

  3. 3

    Lay the pad

    Staple the pad, seam it with tape and trim it inside the strip.

01 · Your numbers
Carpet
37.3 sq yd
Seams
1
Pad
30 sq yd
Est. cost
$1,120
02 · The plan

6 steps · 5 tools · 4 materials

3 more steps, the full tool list and a shopping list you can check off as you go.

03 · Finished

Your plan is 60% built. Save it.

3/5

Carpet a 18 x 14 ft room

Finished in 1 weekend · $1,120 DIY

Built for your carpet of 37.3 sq yd. Your first plan saves free. No card needed.

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How to measure for carpet

A wider room means a seam and extra linear feet. The measuring guide covers getting accurate room dimensions.

  1. Measure the room. Measure at the widest points, including closets and door openings.
  2. Compare layouts. Work out strips both ways on the roll and take the shorter total.
  3. Add stairs. Allow about 18 in per step for tread, riser and wrap.
  4. Convert. Linear feet times roll width, divided by 9, equals square yards.

Frequently asked questions

How wide is a roll of carpet?

Most residential carpet comes in 12 ft rolls, with some 15 ft styles. Rooms wider than the roll need a seam.

How much carpet do I need for stairs?

Allow about 18 in of length per step. A flight of 13 stairs takes about 19.5 linear ft.

Why is the carpet quantity more than the room area?

You buy full-width strips, so the leftover beside a narrow strip is paid for even if you cannot use it.

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