It’s a good idea to measure the width in at least 2 different spots in case the landing is not completely square. Use the longest of the measurements when calculating how much carpet you need (carpet can always be trimmed down to fit).
Check the length of the landing in at least 2 places and go with the bigger number if there is any difference.
The carpet will be folded under and stapled during installation to get a clean-looking finished edge. This is why you need to add 2 in (5. 1 cm) to both the length and width.
Do this for 2-3 stairs in case there are any variations in width. Use the widest measurement as the number for your width to ensure you get carpet that is wide enough (you can trim it to fit any stairs that are narrower). [5] X Expert Source Josh GoldenbergResidential Remodeling Expert Expert Interview. 25 January 2022.
The tread of a stair is the part that you step on when walking up and down the stairs. Think of the depth as how much room for your foot there is from heel to toe on the stair. Again, do this for 2-3 stairs and use the larger number for the depth of the stairs if there are any differences.
Note that the rise is how tall the stair is, whereas the depth is how deep the tread is. The rise is a vertical measurement, and the depth is a horizontal measurement. Do this at least 2 times to make sure you are getting the right number for the rise. Use the bigger number if there are any variations.
For example, if the depth of the stairs is 10 in (25 cm) and the rise is 7 in (18 cm) then you would multiply 17 in (43 cm) by the number of stairs. If there are 10 stairs, then the total would be 170 in (430 cm).
For instance, if you know that you need 170 in (430 cm) of carpet, then get at least 174 in (440 cm) to account for error.
