What Drill Bit

Plywood sizes

Actual plywood thickness by the category on the stamp, sheet size in inches and mm, and what the grades mean.

Start here Plywood thickness converter Pick a size name to see its stamp category, label and range, or enter what your sheet measures in inches or mm. Convert a thickness Reference Actual plywood thickness chartEvery PS 1 category with its label and range, sanded and unsanded, with a printable PDF. Calculator Plywood sheet calculatorSheets for a wall, floor or project, counted by area. Reference Plywood sheet size4 x 8 feet, and how much under that a sheet may be.

By size name

The two PS 1 categories each size name can carry on its stamp.

3/4"plywood23/32 or 3/4 1/2"plywood15/32 or 1/2 5/8"plywood19/32 or 5/8

Grades and types

What the letters and names on a panel mean.

Plywood grades explainedA to D, CDX, ExteriorPlywood typessheathing, sanded, hardwood, MDOMarine plywoodPS 1 and BS 1088

Elsewhere on What Drill Bit

Lumber sizesa 2x4 is 1-1/2" x 3-1/2"Pocket-hole screw selectorby stock thicknessHow long should a screw be?screws into plywoodPilot hole in plywoodthe softwood pilotSizes & chartsthe hub

Plywood figures here are for US structural plywood made to PS 1. Which panel a floor, roof or wall needs comes from its span rating and your local building code.