How do I calculate vinyl siding?

Vinyl siding is sold in squares (100 sq ft) or by the carton. Measure wall area in square feet, divide by 100 for squares, then add 10% for waste.

Vinyl Siding Calculator

Calculate the number of vinyl siding panels needed to cover your exterior walls.

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Enter Your Measurements

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How to Use This Calculator

1Calculate gross wall area (perimeter × height).
2Subtract door and window areas.
3Click Calculate.

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About This Material

Vinyl siding panels typically expose 4–5 inches of face per course. Most 12-foot panels cover about 2 sq ft of net wall area per linear foot. Coverage varies by profile — check manufacturer specs.

Installation Tips

•Install on a flat, plumb substrate.
•Leave 1/4" gaps at all trim for thermal expansion.
•Do not face-nail vinyl — use the nail slot.
•Work from bottom to top, overlapping courses.

Common Mistakes to Avoid

Face-nailing vinyl — it will buckle in summer heat.
Not leaving expansion gaps at trim — causes buckling.
Installing in very cold weather — vinyl becomes brittle.