A fraction to decimal conversion table for common fractions used in measurements is also provided at the bottom of the page.
Carpet measuring calculator stairs.
Width x run rise nose x number of stairs area.
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.
To use our stair calculator you need to enter the following measurements as a minimum.
For a typical set of 12 box stairs measuring 3 wide using a carpet that is 12 wide you would require 12 x 4 6 in a 12 width of carpet you get 4 box stairs 12 divided by 3 so every 12 x 18 gives you 4 stairs.
The stair calculator is an online tool for calculating various parameters involved in the construction of stairs.
After measuring the riser get the length and width of any landings then round all of your measurements up to the nearest foot.
Length of the step.
Include an inch or two extra to wrap around the nose.
Height of the step.
How to calculate stairs.
Total rise the vertical height between the bottom of the first step and the top of the final step in the stair stringer.
Total run the total horizontal length of the stair stringer.
As you can see entering the room and stair dimensions into our carpet calculator makes life much easier.
Next measure upward across the tread and riser of 1 stair.
How to measure stairs for carpet.
Multiply that by the number of stairs.
Divide by 12 and round up to get the number of feet.
For a straight staircase.
Measure the rise and run.