Calculate how many plywood sheets you need for your floor, wall, or roof project. Free online plywood sheet calculator.
The plywood calculator estimates how many standard 4×8 foot plywood sheets you need for your project. It calculates the total area and converts it to the number of sheets, including a waste factor for cuts and mistakes.
Sheets = Area (sq ft) / 32 | With Waste = Sheets × 1.10A standard plywood sheet is 4×8 feet = 32 square feet. Divide total area by 32 to get the number of sheets. A 10% waste factor is recommended to account for cuts, mistakes, and offcuts.
| Input | Output |
|---|---|
| 20×15 ft floor | Area: 300 sq ft, Sheets: 10, With waste: 11 |
| 12×10 ft wall | Area: 120 sq ft, Sheets: 4, With waste: 5 |
| 40×30 ft roof | Area: 1,200 sq ft, Sheets: 38, With waste: 42 |