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Plywood Sheathing Calculator
Estimate 4×8 plywood or OSB sheets for any surface.
How the plywood sheathing calculator works
A 4×8 sheet of plywood or OSB covers 32 ft². Divide total area by 32 and add waste for cuts (10% straight, 15% with hips/valleys).
Frequently asked questions
How many 4×8 sheets in 1000 sq ft?
1000 ÷ 32 = 31.25, so 32 sheets, plus ~10% waste = 35 sheets.
How many nails per plywood sheet?
About 50 for wall or roof sheathing (6 in on edges, 12 in in field). Subfloor uses ~60 with construction adhesive.
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