Plywood Sheets for a 20×20 Area
A 20×20 area is 400 sq ft — about 14 sheets of 4×8 plywood once you add 10% waste. Works for subfloor, wall and roof sheathing.
Plywood sheets
14 sheets
Area to cover
400 sq ft
4×8 sheets
14 sheets32 sq ft each, +10% waste
Cost (est.)
$490~$35/sheet
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Want the full guide — tools, step-by-step, common mistakes and FAQ? See the Plywood Calculator.