Stair Carpet Calculator - Calculate Carpet for Stairs
Free stair carpet calculator to estimate the total length and area of carpet needed for your staircase, including landings. Get accurate measurements for your DIY project.
Stair Carpet Calculator
Results
What is a Stair Carpet Calculator?
A stair carpet calculator is a free DIY tool that helps you estimate the amount of carpet needed for a staircase. By entering the dimensions of your stairs, it accurately calculates the total length and area of carpeting required, including an allowance for wastage.
This calculator is ideal for:
- DIY Homeowners planning to install their own stair carpet.
- Budgeting for a professional carpet installation.
- Contractors needing a quick estimate for a project.
For general flooring projects, use our Carpet Calculator to estimate room carpeting.
If you are building the stairs themselves, our Stair Calculator can help with the structural dimensions.
To estimate paint for the surrounding walls, try our Paint Calculator.
How The Calculator Works
The calculation is based on a standard formula:
A 15% wastage factor is then added to this total length to account for cuts and pattern matching. The total area is calculated by multiplying the final length by the stair width.
How to Use This Calculator
Enter Stair Count
Input the total number of stairs.
Measure Dimensions
Enter the tread depth, riser height, and width in inches.
Add Landing (Optional)
Check the box and enter landing dimensions if applicable.
Get Results
View the total carpet length and area required.
Factors That Affect Your Results
1. Stair Shape
Winding, curved, or pie-shaped stairs require more cuts and typically increase wastage.
2. Carpet Pattern
Carpets with large or complex patterns require more material to ensure the pattern aligns correctly on each step.
Frequently Asked Questions (FAQ)
Q: How much extra carpet should I buy for wastage?
A: It is recommended to add 10-20% to your total calculated length for wastage. This accounts for cuts, pattern matching, and potential mistakes. Our calculator automatically adds a standard 15% for wastage.
Q: What is a standard carpet roll width?
A: In the United States, standard carpet roll widths are typically 12 feet (144 inches) and 15 feet (180 inches). It's important to choose a roll width that is wider than your stairs to avoid seams.
Q: How do I calculate carpet for stairs with a landing?
A: To calculate carpet for stairs with a landing, you measure the length required for the stairs and add the length of the landing. The calculator does this for you when you select the 'Include Landing' option and provide the landing dimensions.
Q: Does the direction of the carpet pile matter on stairs?
A: Yes, the pile direction is very important. For both safety and appearance, the carpet pile should always run down the stairs. This prevents premature wear and ensures a uniform look.
Q: Can I use this calculator for winding or spiral stairs?
A: This calculator is designed for straight staircases. Winding or spiral stairs require more complex measurements and cutting, often resulting in more wastage. For such stairs, it's best to consult a professional installer.
Q: What is the difference between tread and riser?
A: The tread is the flat, horizontal part of the stair that you step on. The riser is the vertical part of the stair between each tread. Our calculator uses both measurements to determine the length of carpet needed for each step.