Siding Boxes & Panels by Material
Turn an area into whole boxes, bundles or squares of a specific material, using its coverage and exposure. Vinyl, cedar shingle, fiber cement, engineered wood, metal and more.
1,470 sq ft of Vinyl lap (double-4") at 200 sq ft per box is about 8 boxs. Each material is boxed or bundled to cover a set area at a set exposure — divide the area (with waste) by the box/bundle coverage and round up; the manufacturer’s stated coverage wins over any rule of thumb.
1 Enter your numbers
Squares tell you the size of the job; boxes and bundles tell you what to load on the truck. The link between them is the material’s coverage — how much wall one unit finishes at its rated exposure — and it varies a lot by product. A box of double-4″ vinyl covers about 200 sq ft (two squares); a bundle of cedar shingle covers roughly 25 sq ft at a 5″ exposure. Fiber cement, engineered wood and metal lap are usually planned by the square and cut from planks.
This calculator applies your waste factor, divides by the selected material’s coverage, and rounds up to whole units. It reads the same coverage figures as the siding coverage by material dataset, so your box count and the reference chart always agree.
Coverage is the manufacturer’s number
The coverage values here are labeled planning typicals. The stated coverage on the box you actually buy — which depends on the profile, the exposure and the product line — always wins. Use this for planning and confirm against the installation instructions before you order.
Formula
units = ⌈ area × (1 + waste%) ÷ coverage_per_unit ⌉
coverage_per_unit is the labeled coverage of one box, bundle or square of the chosen material. Exposure (the visible height of each course) drives that coverage — a smaller exposure means more pieces per square.
Worked example
1,336 sq ft of net area, 10% waste, in double-4″ vinyl at 200 sq ft/box:
- Area with waste: 1,336 × 1.10 = 1,469.6 sq ft
- Boxes: 1,469.6 ÷ 200 = 7.35 → ⌈7.35⌉ = 8 boxes (= 16 squares of coverage)
In cedar shingle at ~25 sq ft/bundle, the same 575 sq ft porch wall would be ⌈575 ÷ 25⌉ = 23 bundles — a reminder that the material, not just the area, sets the count.
Coverage, exposure and ordering
- Confirm the box coverage. Vinyl profiles, fiber cement lines and shingle grades differ — the printed coverage on your product is the one that counts.
- Exposure changes everything. Installing shingles at a tighter exposure than rated uses more bundles and more labor; the coverage figure assumes the standard exposure.
- Boxes round up hard. Eight boxes covers more than you need — that surplus is your repair stock, not an error.
- Accessories are separate. Starter, J-channel, corners and trim are ordered by the linear foot, not in these boxes.
Reference table
Labeled published planning snapshot — confirm the manufacturer’s stated coverage. 1 square = 100 sq ft.
| Material | Typical exposure | Coverage per unit |
|---|---|---|
| Vinyl lap (double-4") | 8" per panel | ~200 sq ft/box |
| Vinyl lap (double-5") | 10" per panel | ~200 sq ft/box |
| Insulated vinyl | 6–7" | ~200 sq ft/box |
| Cedar shingle / shake | ~5–8" | ~25 sq ft/bundle |
| Fiber cement lap plank | 4–8" (plank) | ~100 sq ft/square |
| Engineered wood lap | 4–8" | ~100 sq ft/square |
| Wood / cedar bevel lap | 4–8" | ~100 sq ft/square |
| Steel / aluminum lap | 8" | ~100 sq ft/square |
| Board & batten | board width | ~100 sq ft/square |