How much carpet do I need for 14 stairs?

For 14 standard stairs (10-inch tread, 7-inch riser): each step needs about 21 inches of carpet (tread + riser + wraps). Total = 294 inches = 8.2 yards of length. If carpet is 12 feet wide and stairs are 36 inches, you can cut 4 strips per yard — order 3 yards.

Is it better to carpet stairs with a runner or wall to wall?

Wall-to-wall is more durable and easier to install cleanly. Runners look elegant and showcase wood risers and treads, but the exposed wood must be finished. Runners also need to be replaced more often as they wear in the center.

What carpet is best for stairs?

Look for a face weight of 35 oz or higher, nylon or wool fiber, and a short cut pile or loop pile. Berber loop pile is especially durable. Avoid long-pile plush — it mats down quickly on stairs.

Can I install stair carpet myself?

Yes, with a knee kicker, carpet tucker, and tack strips. It's harder than flat carpet installation because every step must be stretched and tucked individually. Budget 30 to 45 minutes per step for a first-timer.

How to Calculate Carpet for Stairs

Stair carpet is sold by the yard. Here's exactly how to measure treads and risers and convert to the square yards your installer will quote.

Measure Each Step

Each step has a tread (the horizontal surface you walk on) and a riser (the vertical face). Standard treads are 10 to 12 inches deep; standard risers are 7 to 7.75 inches tall.

To carpet a step fully: measure tread depth + riser height, then add 2 inches of wrap on each end (to tack under the nosing and fold behind the riser). For a 10-inch tread and 7-inch riser: 10 + 7 + 2 + 2 = 21 inches per step.

Measure width across the stairs. A standard staircase is 36 to 42 inches wide. If your carpet is 12 feet wide, you can cut multiple strips side by side from one width — this reduces waste significantly.

Calculate Total Carpet Needed

Total inches of carpet = (tread + riser + 4 inches wrap) × number of steps. Convert to yards by dividing by 36.

For 14 steps at 21 inches each: 14 × 21 = 294 inches = 8.17 yards of carpet length. If carpet is 12 feet wide and stairs are 36 inches wide, you get four strips per width, so you need only 2.1 linear yards — about 3 yards ordered.

If carpeting a single strip down the center (a runner), you need the full length but only the runner width — typically 27 to 36 inches wide. Add 15% for stretching and waste.

Free tool: Carpet Stairs Calculator →

Pattern Repeat on Stair Carpet

Patterned carpet on stairs requires every step to align at the same point in the pattern. This can double waste on stairs with large repeats.

For a 12-inch pattern repeat: every strip must start at the same repeat point, so you lose up to 11 inches per step to alignment. Add the pattern repeat length per step to your total calculation.

Solid, textured, or cut-pile berber are the most waste-efficient choices for stairs. Large geometric patterns look beautiful but cost significantly more in material.

Carpet Types for Stairs

Cut pile carpet (plush, saxony, frieze) is comfortable but shows footprints and wear faster on stairs. Loop pile (berber) is more durable and hides traffic patterns well.

Face weight (ounces per square yard) matters for stairs. Look for 35 oz or higher for high-traffic stairs. Lighter face weight carpets wear through on the tread nosing within a few years.

Wool and nylon are the most durable fibers for stairs. Polyester feels soft but matts down under heavy traffic. Triexta (Mohawk's SmartStrand) is a good mid-range option — durable and stain-resistant.

Stair Carpet Cost

Carpet material for stairs runs $3 to $15 per square foot depending on fiber and face weight. Installation on stairs costs $3 to $7 per step for professional installation (tucking, stretching, tacking).

A standard 14-step staircase costs $200 to $700 for material plus $50 to $100 for installation labor, totaling $250 to $800 complete.

Runners (center-strip carpet with exposed wood on each side) cost less in material but require finishing the exposed wood risers and treads, adding to total project cost.

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FAQ

How much carpet do I need for 14 stairs?: For 14 standard stairs (10-inch tread, 7-inch riser): each step needs about 21 inches of carpet (tread + riser + wraps). Total = 294 inches = 8.2 yards of length. If carpet is 12 feet wide and stairs are 36 inches, you can cut 4 strips per yard — order 3 yards.
Is it better to carpet stairs with a runner or wall to wall?: Wall-to-wall is more durable and easier to install cleanly. Runners look elegant and showcase wood risers and treads, but the exposed wood must be finished. Runners also need to be replaced more often as they wear in the center.
What carpet is best for stairs?: Look for a face weight of 35 oz or higher, nylon or wool fiber, and a short cut pile or loop pile. Berber loop pile is especially durable. Avoid long-pile plush — it mats down quickly on stairs.
Can I install stair carpet myself?: Yes, with a knee kicker, carpet tucker, and tack strips. It's harder than flat carpet installation because every step must be stretched and tucked individually. Budget 30 to 45 minutes per step for a first-timer.