When installing a carpet on your staircase, precise calculations are essential to ensure you purchase the correct amount of material. Our Stairs Carpet Calculator simplifies this process by calculating the total carpet length and area needed based on the staircase dimensions. This guide explains the inputs, formulas, and process behind the calculator.

How to Use This Stair Carpet Calculator

Using the Stairs Carpet Calculator is simple and straightforward. Follow the steps below to get accurate estimates for your staircase carpet requirements:

Steps to Use the Calculator

1.Measure Riser Height (Rise):

• Measure the vertical height of one step (riser) using a tape measure.
• Enter the value in inches or centimeters.

2.Measure Tread Depth (Run):

• Measure the horizontal depth of one step (tread).
• Enter the value in inches or centimeters.

3.Enter the Number of Steps:

• Count the total number of steps or risers in your staircase, including the last step.

4.Enter the Staircase Width:

• Measure the width of your staircase where the carpet will be laid.
• Enter the value in inches or centimeters.

Inputs Required

1. Riser Height (Rise): The vertical height of one step.
2. Tread Depth (Run): The horizontal depth of one step.
3. Number of Steps: Total number of steps or risers in the staircase.
4. Width of Staircase: The width of the staircase where the carpet will be laid.

Formulas Used in the Stairs Carpet Calculator

Carpet Length for One Step

The length of carpet required for one step is the sum of the riser height and the tread depth.

$\text{Length per Step} = \text{Riser Height} + \text{Tread Depth}$

Total Carpet Length

The total carpet length required for the staircase is the product of the length per step and the total number of steps.

$\text{Total Carpet Length} = (\text{Riser Height} + \text{Tread Depth}) \times \text{Number of Steps}$

Total Carpet Area

The total carpet area is calculated by multiplying the total carpet length by the width of the staircase.

$\text{Total Carpet Area} = \text{Total Carpet Length} \times \text{Width of Staircase}$

Example Calculation

Let’s calculate the carpet needed for a staircase with the following dimensions:

• Riser Height: 7 inches
• Tread Depth: 10 inches
• Number of Steps: 12
• Width of Staircase: 36 inches

Step 1: Carpet Length for One Step

$\text{Length per Step} = 7 + 10 = 17 \, \text{inches}$

Step 2: Total Carpet Length

$\text{Total Carpet Length} = 17 \times 12 = 204 \, \text{inches} \, (17 \, \text{feet})$

Step 3: Total Carpet Area

$\text{Total Carpet Area} = 204 \times 36$

$\text{Total Carpet Area} = 7344 \, \text{square inches}$

$\text{Total Carpet Area} = \text{51 square feet}$

Additional Tips for Accuracy

• Double-check all measurements to avoid errors in your calculation.
• If your staircase includes a landing, measure its area separately and add it to the results.
• Always add 10-20% extra to the calculated carpet to account for waste during installation.