How to Measure for a Stair Runner
How to Measure a Stair Runner: The Master Installer's 2026 DIY Guide
Planning a DIY project? A custom stair runner is the single best way to transform your home on a budget. Whether you're in a character home in Victoria or a new build in the GTA, getting your measurements right is the difference between a pro finish and a disaster.
I'm going to show you exactly how to measure your stairs so you can order the perfect amount of carpet from our Hamilton shop—no wasted money, no running short.
Skip the Manual Math
I've built a custom tool that handles the numbers for you. It's the same math I've used on the job for three decades.
Step 1: Calculating the Total Length (Linear Feet)
For a standard straight staircase, don't overcomplicate it. Use my "19-Inch Rule": measure from the base of one riser, up and over the tread nosing, and down to the base of the next riser. You'll typically get 18.5 to 19.5 inches per step. Multiply that by your number of steps, add one extra riser at the top (about 6 inches), and add one full extra foot as a buffer. Convert to feet and that's your order length.
Agree. Great info. Yet I need idea on how to measure a curved or wide to narrow staircase. I’m assuming I might have to order separate (and graduating m) sizes or separate pieces to accommodate different widths. Would love your help
Outstanding videos! You really do a great job explaining the process. How do I measure my two
Pie shaped steps for the runner?
Can you please provide instructions for measuring a winding/curve staircase for custom cutting? Thank you!
How do I measure only my treads I have 12 treads @ 36 1/8” wide X 12 1/2” deep and one landing 38” deep X 36 1/8” wide. I only want to carpet my treads only. My residents is non Loveland co and love your DIY!!!!! Pls let me know so I can order from you guys and I will be doing the installation myself. I have the tools already.
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