ft
Used only when Preset = Custom
ft
Used only when Preset = Custom
%
$
Surfaces to Cover (width × height in ft)
| # | Width | Height | Count | Area | |
|---|---|---|---|---|---|
Openings to Subtract (width × height in ft)
| # | Width | Height | Count | Area | |
|---|---|---|---|---|---|
Results
| Unit System | Imperial (ft) |
|---|---|
| Total Surface Area | 0 |
| Total Openings Area | 0 |
| Net Area | 0 |
| Panel Size | 4×8 ft |
| Panel Area | 32 ft² |
| Sheets (before waste) | 0 |
| Waste % | 10% |
| Sheets Required | 0 |
| Estimated Cost | — |
| Estimated Fasteners | — |
Size Comparison (Presets)
| Size | Area | Sheets Raw | Sheets With Waste |
|---|---|---|---|
| 4×8 | 32 ft² | 0 | 0 |
| 4×9 | 36 ft² | 0 | 0 |
| 4×10 | 40 ft² | 0 | 0 |
Example Data
These values mirror the “Load Example” button for quick testing.
| Type | Width | Height | Count | Area |
|---|---|---|---|---|
| Surface | 12 ft | 8 ft | 2 | 192 ft² |
| Surface | 10 ft | 8 ft | 2 | 160 ft² |
| Opening | 3 ft | 4 ft | 3 | 36 ft² |
| Opening | 6 ft | 7 ft | 1 | 42 ft² |
| Net Area | 274 ft² | |||
Formulas Used
- Surface Area = Σ(width × height × count)
- Openings Area = Σ(width × height × count)
- Net Area = Surface Area − Openings Area
- Panel Area = panel width × panel height
- Sheets (raw) = Net Area ÷ Panel Area
- Sheets (with waste) = ceil(Sheets (raw) × (1 + waste/100))
- Cost = Sheets (with waste) × price per sheet (if provided)
Notes
- Imperial: ft and ft². Metric: m and m².
- 4×8/4×9/4×10 preset areas convert to metric when selected.
- Waste covers trims, damage, orientation, and layout inefficiencies.
How to Use This Calculator
- Select your unit system and a panel preset, or define custom size.
- Add each surface to cover with width, height, and quantity.
- Add window/door openings to subtract from coverage.
- Set a waste percentage reflecting cuts, offcuts, and handling losses.
- Optionally enter price per sheet and fasteners per sheet.
- Click Calculate to see sheets required, cost, and comparisons.
- Export your results as CSV or PDF for records and procurement.
FAQs
Thickness depends on application and span. Walls commonly use 7/16–1/2 inch; floors and roofs often require 5/8–3/4 inch. Always follow local codes and manufacturer span ratings.
Typical projects use 5–15% waste. Complex layouts, diagonal sheathing, or high-damage environments may require more. Use site experience or talk to your supplier.
Orientation affects seams, nailing, and cuts but this calculator estimates by area. If orientation forces extra cuts, increase the waste percentage to compensate.
Fasteners are optional and scaled by sheets. Final fastener counts depend on spacing patterns, edges, and code requirements for your project.
Yes, the math is the same. Update sizes, costs, and waste assumptions to match the material and grading you purchase.
No. It assumes full sheathing coverage. If framing reduces sheathing area in your method, reflect that by adjusting surfaces or waste.
It provides planning estimates only. For structural design, shear wall capacities, and code-specific requirements, consult design documents, codes, or a licensed professional.
Disclaimer: Results are planning estimates. Verify on site, follow local codes, manufacturer instructions, and professional advice where required.