Length of the step.
Carpet measuring calculator stairs.
Next measure upward across the tread and riser of 1 stair.
After measuring the riser get the length and width of any landings then round all of your measurements up to the nearest foot.
Total run the total horizontal length of the stair stringer.
A fraction to decimal conversion table for common fractions used in measurements is also provided at the bottom of the page.
How to calculate stairs.
Count all the stairs and enter these numbers into the stair calculator.
As you can see entering the room and stair dimensions into our carpet calculator makes life much easier.
To calculate how much carpet you ll need for your stairs start by measuring the width of 1 tread with a tape measure and add 2 inches to make sure you have enough carpet.
How to measure stairs for carpet.
If doing by hand multiply your stair area plus the padding by the number of stairs to determine how many square feet of carpet you ll need for all stairs.
Divide by 12 and round up to get the number of feet.
Multiply that by the number of stairs.
Include an inch or two extra to wrap around the nose.
To use our stair calculator you need to enter the following measurements as a minimum.
For a straight staircase.
Total rise the vertical height between the bottom of the first step and the top of the final step in the stair stringer.
Height of the step.
Measure the rise and run.
Refer to the figure adjacent to the calculator as a reference.