Where the seam should sit
The best seam location is the top riser, right where the vertical face meets the landing floor. Foot traffic lands flat on the landing at that point rather than on an angled tread, so a seam there takes less abrasive stress than one placed mid-tread. It also falls in a natural shadow line, which hides the join from anyone looking up the stairs.
Same carpet, no seam at all
If the landing is being carpeted in the same broadloom as the runner's border, or the runner itself is wide enough to be used as landing carpet, some fitters run the material continuously over the top step and a short distance across the landing, then finish it there with gripper and a threshold. This avoids a visible seam entirely but uses noticeably more material and only works when the landing area is small.
Different materials, use a transition bar
- Carpet-to-carpet: a double gripper or seaming tape strip, tucked under both edges.
- Runner-to-hardwood landing: a flush wood-to-carpet transition bar screwed to the subfloor.
- Runner-to-tile: a metal Z-bar or carpet edge trim, sealed against moisture.
- Thick runner-to-thin landing carpet: a reducer strip to avoid a trip lip.
How much extra length to allow
| Transition type | Extra length allowance | Difficulty | DIY-able |
|---|---|---|---|
| Seam at top riser | 0.1–0.2 m (4–8 in) | Easy | Yes |
| Continuous over top step onto landing | 0.4–0.6 m (16–24 in) | Moderate | Yes, with care |
| Runner to tile/hardwood with bar | 0.1 m (4 in) plus bar cost | Easy | Yes |
| Matching full landing carpet | Landing area + 0.15 m waste | Moderate | Fitter recommended |
Measure the landing separately
Never guess a landing quantity from the stair calculation. Measure its length and width on their own and add standard carpet waste, typically 5 to 10 percent.
Know your numbers in 30 seconds
Enter your step count, tread depth and riser height — the stair runner calculator gives you the exact length to order, in metres and feet, with waste included.
Open the stair runner calculatorColour and pile matching
A seam is far less noticeable when the two carpets share a similar tone and pile height. If the landing is a different colour by design, a contrasting binding on the runner or a defined metal trim reads as intentional rather than as a mismatch.
Worked example with real numbers
To see how transitioning from a stair runner to landing carpet plays out on an actual staircase, take a common 13-step flight with a 10 in (25 cm) tread depth and a 7.5 in (19 cm) riser height. That gives 17.5 in (44 cm) per step, or 227.5 in (5.78 m) of raw length before any waste allowance is added, a figure worth keeping in mind whenever this topic is discussed in isolation from the rest of the job.
| Measurement | Imperial | Metric |
|---|---|---|
| Tread depth | 10 in | 25 cm |
| Riser height | 7.5 in | 19 cm |
| Per step total | 17.5 in | 44 cm |
| 13 steps, raw length | 227.5 in | 5.78 m |
| With 8% waste allowance | 245.7 in | 6.24 m |
When to call a professional instead
Plenty of homeowners handle transitioning from a stair runner to landing carpet themselves on a straightforward straight flight, but certain conditions tip the balance firmly towards hiring a fitter. Getting a second opinion before committing materials often costs nothing and can save an expensive mistake on a job that cannot easily be undone.
- The staircase has a turn, winders, a curve or a split level rather than one straight run.
- The existing substrate is damaged, damp, or its condition is genuinely unclear.
- The runner is an expensive natural fibre or bespoke pattern where a cutting mistake is costly.
- You have no experience with a staple gun, knee kicker or carpet seaming on stairs.
- The staircase is the main one in the home and downtime or an unfinished look is not acceptable.
Whatever you decide, get the numbers first: the stair runner calculator doubles as a stair runner length calculator, adding nosing wrap, landings, winders, pattern repeat and waste so you order the right length the first time.
Frequently asked questions
Where should a stair runner meet landing carpet?
At the top riser, where the vertical face meets the landing floor. This hides the seam in a shadow line and puts it where traffic lands flat rather than on an angled tread.
Can a stair runner run straight onto the landing without a seam?
Yes, if the landing is small and using the same carpet is acceptable. The runner or matching broadloom is carried over the top step and finished with gripper a short distance onto the landing.
Do I need a transition strip between a runner and landing carpet?
Only if the materials, thicknesses or pile heights differ noticeably, or if one is carpet and the other is hard flooring. Matched carpets can be seamed directly with tape.
How much extra runner do I need for a landing transition?
Typically 4 to 8 inches (0.1 to 0.2 m) if you are simply seaming at the top riser, or considerably more if you plan to run the runner onto the landing itself.
What is the biggest mistake people make with this?
Rushing the measuring or prep stage. Most poor outcomes with transitioning from a stair runner to landing carpet trace back to a single measurement taken at the wrong point, or a substrate check skipped to save a few minutes, both far cheaper to fix before the runner is cut than after.
Know your numbers in 30 seconds
Enter your step count, tread depth and riser height — the stair runner calculator gives you the exact length to order, in metres and feet, with waste included.
Measure my stairs and landingEvery guide is written from hands-on measuring and fitting experience, checked against the calculator’s own maths, and re-reviewed whenever prices or methods change. Read our editorial standards.