How many squares of siding are in a box?

Carpentry & FramingExterior Cladding Estimator

Vinyl Siding Material & Squares Calculator

Calculate total siding squares, starter strips, inside/outside corner posts, and J-channel trim pieces for exterior home remodeling.

Carpentry & Framing Field StandardsExterior Cladding Estimator

Engineering formulations calibrated to IPC, UPC & NEC specificationsSub-Zero Cold Climate Tolerances

Quick Summary & Key Answer

To calculate vinyl siding: subtract window and door square footage from total wall area, add 10-15% for cutting waste, and divide by 100 to determine roofing/siding squares. A 2,200 sq ft exterior with 300 sq ft of openings requires roughly 21 squares (eleven 2-square boxes) of siding.

1 Siding Square = 100 square feet of wall coverage.
Vinyl expands and contracts up to 1/2 inch between summer and winter.
Always center nails in pre-punched slots to permit horizontal sliding.

Interactive Calculator

Adjust inputs for real-time results

Gross Exterior Wall Areasq ft

sq ft

Total Windows & Doors Area to Deductsq ft

sq ft

Waste Allowance

Calculated OutputSiding Sized

Total Siding Squares (100 sq ft)

21 Squaressquares

Standard Boxes of Siding (2 sq/box): 11 boxes
Net Siding Surface Area: 1900 sq ft
Total Area with Waste Factor: 2090 sq ft
Estimated J-Channel (12.5 ft pcs): 48 pieces

Note: Never nail vinyl siding tight; leave 1/32" gap between nail head and vinyl flange to allow 1/2" thermal expansion and contraction.

Crucial Vinyl Nailing Code

Driving nails tight into wood studs pins vinyl, causing unsightly buckling and wave distortions during warm weather.

Frequently Asked Questions

Common questions regarding this calculation and code compliance

Most standard residential vinyl siding is packaged in boxes containing two (2) squares (200 square feet of coverage).