Use our free Siding Calculator to quickly estimate the amount of siding materials needed and the total project cost. Whether you're planning a DIY project or budgeting for professional installation, this tool helps you plan accurately by calculating square footage and factoring in waste for your home improvement.
Formula:
The total siding area is calculated by summing the wall areas and then subtracting the areas of windows and doors. A waste factor is then applied to determine the material needed and total cost.
Formulas:
- Net Wall Area = (Wall Length × Wall Height) - (Window Area × Number of Windows) - (Door Area × Number of Doors)
- Total Siding Needed = Net Wall Area × (1 + Waste Factor / 100)
- Estimated Material Cost = Total Siding Needed × Cost Per Square Foot
Variables:
- Wall Length: Total linear feet of walls to be sided.
- Wall Height: Average height of the walls.
- Window Area: Average square footage of one window.
- Door Area: Average square footage of one door.
- Number of Windows/Doors: Total count of windows/doors.
- Cost Per Square Foot: Material cost of siding per sq ft.
- Waste Factor: Percentage (e.g., 5-15%) for cuts, errors.