Use this plywood sheathing calculator to estimate how many plywood sheets you need for walls, roofs, floors, gable ends, or repair areas. It also gives a rough material-only estimate if you enter your local plywood price per sheet.
This is a material planning calculator. It does not choose panel grade, thickness, span rating, fastening schedule, exposure rating, structural bracing, or code compliance.
Estimate your plywood sheathing
How this estimate works
The calculator divides net sheathing area by panel coverage, adds waste, adds optional extra sheets, and multiplies by your local plywood price if you want a material-only estimate.
What it does not decide
It does not decide whether plywood is required or worth the upgrade. Roof conditions, wall exposure, edges, wet zones, structural rating, and local code still matter.