How much siding waste should I plan for?

Add 10% for simple walls and up to 15% for homes with many corners and gables.

What is a square of siding?

A square covers 100 square feet of wall, the same unit used for roofing.

Enter your wall area and the openings to deduct to estimate siding squares and an optional cost.

Estimates only. Round up and buy a little extra to account for waste, spills, and breakage.

Net area = wall area − openings. Squares = net area ÷ 100, × (1 + waste%).

How much siding waste should I plan for?: Add 10% for simple walls and up to 15% for homes with many corners and gables.
What is a square of siding?: A square covers 100 square feet of wall, the same unit used for roofing.

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Estimate siding squares for your home's walls, including openings and waste.