Siding Squares Calculator
A siding square is a standard construction unit equal to 100 sq ft. Enter your gross wall area, subtract any openings, and this calculator converts the result into siding squares.
Area
Waste factor
Siding needed
- Net area
- 0 sq ft
- Plus waste
- 0 sq ft
- Required area
- 0 sq ft
What is a siding square?
A siding square equals 100 square feet of wall coverage — a unit used industry-wide to price and order siding material regardless of the specific product's panel or board size. Converting your project's area into squares makes it easy to compare quotes and material quantities across different products.
This is a planning estimate
Frequently asked questions
How many squares of siding do I need for a 2,000 sq ft house?
House square footage measures floor area, not exterior wall area, so there’s no fixed conversion. Measure your actual walls and gables, subtract openings, and use this calculator to find your squares.
How many pieces of siding are in a square?
It depends on the product’s exposure and length. A vinyl double-4 panel at roughly 12.5 ft long covers about 8.3 sq ft, so around 12 pieces make up one square — but this varies by manufacturer.
Why do contractors use squares instead of square feet?
Squares (100 sq ft units) simplify pricing and material ordering across different product sizes, similar to how roofing is also priced by the square.
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