Inputs
Segments mode lets you enter walls, ceilings, and openings.
in width
in height
Change preset to auto-fill, or enter custom size in inches.
Global orientation. Segments can override.
in
Global spacing. Segments can override.
in
Global spacing. Segments can override.
in
Global spacing. Segments can override.
%
Mode Inputs
Sum of all surfaces to cover.
Directly enter sheet quantity instead of area.
Segments (feet)
Add walls (rectangular or triangular), ceilings (flat, sloped, vaulted with ridge offset), and openings.
| Label | Type | Shape | Width/Base (ft) | Height/Length (ft) | Orientation | Studs (in) | Field (in) | Edge (in) | Panel W (in) | Panel H (in) | Edge-only | Slope | Pitch L (r/12) | Pitch R (r/12) | Axis | Ridge % |
|---|
| Segment | Width (ft) | Height (ft) | Count |
|---|
Checked: round & adjust each segment independently. Unchecked: sum sheets first.
Wizard adds four rectangular walls and an optional flat ceiling. For triangles or slope offsets, edit the rows afterwards.
$
Results
Per-Sheet Screws
–
Based on studs and spacings.
Estimated Sheets
–
With overage and layers.
Total Screws
–
All segments combined.
Boxes Needed
–
Division by screws per box.
Estimated Cost
–
Boxes × price per box.
| Panel | Orientation | Stud Spacing | Field Spacing | Edge Spacing | Edge-Only | Layers | Sheets | Per-Sheet Screws | Total Screws | Screws/Box | Boxes | Price/Box | Total Cost |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Run a calculation to populate this table. | |||||||||||||
| Segment | Type | Shape | Panel | Slope | Gross ft² | Openings ft² | Net ft² | Base Sheets | Adj. Sheets | Per-Sheet Screws | Segment Screws |
|---|
Example Data
Click a row to load inputs.
| Label | Mode | Key Settings |
|---|---|---|
| Wall, 4×8 @ 16" | Area | Edge 8", Field 12", 400 ft² |
| Ceiling tight, 4×12 @ 16" | Area | Edge 7", Field 8", 300 ft² |
| Segments: room with door & window | Segments | Four walls, one door, one window |
| Vaulted ceiling with 30% ridge offset | Segments | 12×14 room, 10:12 & 6:12 pitches |
| Gable end walls (triangles) 20′ wide | Segments | Base 20′, triangle height 4′, two ends |
Formula Used
- Sheet Dimensions (in): W × H (global or per segment).
- Stud lines across sheet:
Nstuds = ⌊W / S⌋ + 1, where S is stud spacing (in). - Positions per stud:
Pfield = ⌊L / F⌋ + 1,Pedge = ⌊L / E⌋ + 1. - Per-sheet screws:
edgeOnly ? 2·Pedge : max(Nstuds-2,0)·Pfield + 2·Pedge. - Flat walls:
A = width · height. Triangular walls:A = ½ · base · height. - Flat ceilings:
A = width · length. - Sloped ceiling: Single:
A = (axis · √(1 + (rise/12)²)) · other. - Vaulted ceiling: With ridge at fraction
rof axis:A = other · (r·axis·√(1+(riseL/12)²) + (1−r)·axis·√(1+(riseR/12)²)). - Sheets per segment:
ceil( Net ft² / sheet_ft² ), wheresheet_ft² = W·H/144andNet ft² = max(0, Gross − Openings). - Totals:
Total Screws = Σ Psheet,seg · Sheetsseg,adj;Boxes = ceil(Total / screwsPerBox);Cost = Boxes · pricePerBox.
This model estimates fasteners; follow codes, specs, and manufacturer guidance.
Quick Presets
- Walls: edges 8", field 12"
- Ceilings: edges 7", field 12"–8"
How to Use
- Select a mode: area, direct sheets, or segments & openings.
- Set global panel size, orientation, stud spacing, and spacings.
- In segments mode, add rectangles or triangles and assign openings.
- Override orientation, spacings, panel size, edge-only per segment.
- For vaulted ceilings, set pitches and ridge offset percentage.
- Choose layers, overage, packaging, then press Calculate.
- Export results and breakdown to CSV or PDF.
FAQs
Yes. Use “Add Triangular Wall” or set a wall row’s shape to Triangle and enter base and triangle height.
Pick slope “Vaulted”, enter left/right pitches, and set Ridge % (0–100) to position the ridge along the chosen axis.
Triangles change area and sheet count. Per-sheet screw layout still follows your stud/joist spacing and field/edge spacings.
It’s the fraction of the ceiling axis to the left of the ridge. 50% centers the ridge; 30% shifts it closer to the left edge.
Yes, but ensure openings fit within the triangular area. The calculator prevents net area from going negative.
Enter pitch as rise per 12" (e.g., 6:12). Slopes affect surface area, not screw spacing per sheet.