Roof Sheathing Calculator
Estimate roof-sheathing sheets, roof surface area, panel clips, purchased coverage and material cost for a simple gable roof.
Default project preview
49 sheets
Roof surface area
1,421 ft²
Layout sheets
45
Purchased coverage
1,568 ft²
Panel clips
196
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Roof surface = plan dimensions including overhang × pitch slope factor. Order area applies waste. Sheets = round up (order area ÷ sheet area).
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Roof Sheathing Calculator questions
Does pitch increase sheathing quantity?+
Yes. Steeper roofs have more surface area than the horizontal footprint.
Are hips, valleys and dormers included?+
No. Complex geometry usually requires separate measurements and more waste.
Does this choose sheathing thickness?+
No. Thickness and span rating depend on framing spacing, loads and approved specifications.