Siding Calculator
Estimate a siding job fast. Enter the total wall area to cover and this calculator returns the number of siding squares (one square = 100 square feet) plus an approximate nail count. Add a waste factor for cuts around windows, doors, and corners.
Estimate
How to use the siding calculator
- Add up the square footage of every wall you are siding.
- Subtract large openings if you want a tighter number, or leave them in as waste.
- Read the siding squares and nail count. Add waste for trim cuts and corners.
Questions
What is a "square" of siding?
A square is 100 square feet of wall coverage. Siding is ordered and priced by the square, so a 1,500 sq ft wall is 15 squares before waste.
How much waste should I add for siding?
Ten percent is typical for straightforward walls; add more for lots of windows, doors, gables, and corners where cuts pile up.