How to work it out
whole panels by area = ceiling((gross surface area − excluded openings) ÷ panel face area)- A 48-inch-wide panel is 4 feet wide.
- Use the exact listed length of the selected panel.
- Layout review may require more whole panels than the area quotient.
USG product-page size examples
| Width | Listed length | Area expression |
|---|---|---|
| 48 in | 8–12 ft options | 4 ft × selected length |
| 48 in | 95–102 in options | 4 ft × converted length |
| Thickness | 1/4 or 3/8 in for this listed product | select for approved use |
Plan the job
Separate surfaces
Make distinct wall and ceiling schedules so panel orientation and required type remain visible.
Choose a real stocked panel
Use the manufacturer product page and local availability rather than an assumed universal sheet.
Draw the layout
Place seams, openings, edges, and full-length opportunities before treating the area quotient as a purchase count.
Before you start
- Use the panel and assembly required by local code and the specific location.
- Plan safe handling for full-size panels and control cutting dust according to product instructions.
Sources and notes
Source links reviewed July 16, 2026. A review date is not the document's publication date.
- USG: Sheetrock Brand Gypsum PanelsNorth America · manufacturer data sheet
Panel availability and code-required type vary; verify the chosen panel before purchasing.
- National Institute of Standards and Technology: NIST Guide to the SI, Appendix B — Conversion FactorsUnited States · government standard
Code retains exact defining constants where NIST identifies an exact relationship.