Estimate the exact amount of carpet needed for your staircase with our user-friendly Stair Carpet Calculator. Avoid overspending or running short by inputting your stair dimensions, including treads, risers, and landings. Perfect for DIY projects or professional quotes, ensuring a precise and efficient carpet installation.
Formula:
The core calculation for stairs involves summing the length of the tread and riser for each step, then multiplying by the step width and number of steps. Additional area for landings and a waste factor are then added.
- Step Length = Tread Depth + Riser Height
- Total Step Area = Number of Steps × Step Length × Step Width
- Landing Area = Landing Length × Landing Width (if applicable)
- Total Carpet Area (Raw) = Total Step Area + Landing Area
- Final Carpet Area = Total Carpet Area (Raw) × (1 + Waste Percentage / 100)
Variables:
- Number of Steps (N): The total count of individual steps.
- Tread Depth (TD): The horizontal measurement of each step.
- Riser Height (RH): The vertical measurement of each step.
- Step Width (SW): The width of each step.
- Landing Length (LL): The length of any flat landing area.
- Landing Width (LW): The width of any flat landing area.
- Waste Percentage (WP): An extra percentage to account for cuts, patterns, and errors (e.g., 10-15%).