Measure the width of 1 tread with a tape measure.
Measure stairs for carpet runner.
The tread and riser combined have the same measurements as a box stair 18.
You do not have to measure to cover the entire staircase for carpet runners.
Measure the stair to determine the width in grand staircases it could be quite wide.
As you can imagine this type of staircase is the most straightforward to measure and fit carpet runners.
First you need to measure the length of your stairs so you can work out the length of your carpet runner.
Carpet runners are sold in a variety of standard width measurements.
You will require a piece of carpet that is the width of the stair plus a few extra inches to wrap around the outer edge of the tread by 18.
The tread of a stair is the horizontal part of the stair on which you step.
A short video on the tricky subject of how to accurately measure stairs this also includes a guide for calculating how much carpet you will need.
To calculate the length of the staircase for a runner you need to measure the depth of the stair tread and.
Simply purchase the width that best fits your stairs.
Stair runners usually sold by the running foot or yard can be 22 to 36 inches wide.