How to Measure for a Stair Runner

How to Measure for a Stair Runner (Pro Installer’s Guide)

Hi, I’m Keith Shannon from Direct Carpet. I’ve personally installed over 1,000 stair runners across North America over the past 25 years. I’ve measured and installed on straight runs, boxed steps, landings, winders, and tricky turns. This guide outlines my proven process for achieving a perfect fit the first time.

Quick Calculator (Inline)

Use the calculator right here, then scroll down for written steps and expert tips. For the complete tool List.

Number of stairs

Stair width (inches)

Note: This quick estimator assumes a typical 18″ per step (tread + riser). Length is rounded up to the nearest foot. Add full landing lengths separately. For advanced cases (landings, turns, winders), use the full calculator.

What You’ll Need

📏 Tape measure
✏️ Pencil + notepad (or phone)
📐 Optional: small square/ruler

Step‑by‑Step Measuring

Choose your width. Most homes look best at 27–32 inches. Narrow stairs or tight spindles may require less; wide, grand stairs can take more.
Count your steps. Include every tread and riser, plus any landings or winders.
Measure one step run. Tread depth + riser height (include nosing). Take several measurements and use the largest.
Include landings and turns. Measure each landing length and any turns.
Add side reveals. Keep 3–5 inches visible on each side for balance.
Calculate total length. (Tread + riser) × steps + landings + extra for finishing. (Or use the f ull calculator.)

Pro Tips from 25+ Years in the Field

✅ Measure twice, cut once. Double‑check every measurement before ordering.
✅ Allow extra length for all stair runners. This ensures proper fitting and adjustments.
✅ Top riser finishing. Add 6–8 inches so your last step finishes cleanly.
✅ Mind the spindles. Measure between them to ensure your chosen width fits comfortably.

Ready to Shop?

Find the perfect stair runner for your home:

🛒 All Stair Runners – Complete collection.
🤍 Neutral Stair Runners – Timeless, versatile designs.
🎨 Anderson Tuftex Stair Runners – Make a statement.

FAQ

📏 What width should I choose?

In most homes, 27–32 inches looks balanced. Aim for a 3–5 inch reveal on each side and verify spindle/newel clearance. If you’re unsure, run the calculator with your measurements.

↩️ How do I measure landings and turns?

Measure the full landing length and include the next tread/riser sequence after each turn. For 90° turns, add the landing + the first step after the turn; for 180° returns, include both landings and the steps between.

🔍 What if my steps vary in size?

That’s common. Take measurements on a few different steps and use the largest tread+riser value so your runner never comes up short. We can also accommodate custom sizing—just mention your measurements when ordering and we’ll build it to fit.

Written by Keith Shannon — Direct Carpet Runners | Updated Feb 19 2026