Calculate the number of plywood or siding sheets needed for walls, floors, or roofs.
Coverage Dimensions
ft
ft
Material Breakdown
Covering a Surface?
Enter the length and width of the area to see how many sheets you need.
About this calculator
Overview
This calculator helps you estimate the number of plywood, OSB, or siding sheets required for construction projects. It accounts for the standard dimensions of building materials to prevent under-ordering.
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Pro Tips
Always add 10-15% extra for cuts and waste, especially for irregular shapes.
Check the orientation of the grain if the plywood will be visible or needs structural strength in a specific direction.
When sheathing a roof, remember to account for the pitch which increases the actual surface area.
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Fun Facts
"Standard plywood sheets in the US are 4x8 feet, covering 32 square feet."
"In many metric countries, standard sheets are 1220 x 2440 mm (identical to 4x8ft)."
"OSB (Oriented Strand Board) is often used as a cheaper alternative to plywood for sheathing."
"Baltic Birch plywood typically comes in 5x5 foot (1.5x1.5m) sheets."
Formula: Sheets = Ceiling(Total Area / Sheet Area)
