What is the standard size of a plywood sheet?
The standard plywood sheet is 4 ft x 8 ft, produced to 1220 x 2440 mm. It is the default across North America, the UK, Australia, and most of Asia. Continental Europe runs a metric format at 1250 x 2500 mm, slightly larger. Specialty sizes include 5 x 5 ft (1525 x 1525 mm) Baltic birch and longer 4 x 10 and 4 x 12 ft panels for tall walls and commercial formwork.
What is the actual thickness of 3/4 inch plywood?
A panel labelled 3/4 inch usually measures about 23/32 inch (roughly 18 mm). The gap between the nominal label and the actual caliper reading is standard across the industry and comes from sanding and drying during manufacturing. For framing it rarely matters; for cabinetry and grooved joinery it does, so caliper the panel before cutting a dado.
What is plywood size in cm?
The standard 4 x 8 ft sheet is 122 x 244 cm (1.22 x 2.44 m). The metric European sheet is 125 x 250 cm (1.25 x 2.50 m). In millimetres those are 1220 x 2440 mm and 1250 x 2500 mm respectively.
Does plywood come in sizes smaller than 4x8?
Yes. Home centres stock 2 x 4 ft and 2 x 2 ft project panels, plus 4 x 4 ft half sheets, for small cuts and easier transport. Full 4 x 8 sheets remain the most cost-effective on a per-square-metre basis and are standard for construction and cabinet work.
What is the largest standard plywood sheet size?
The most common oversized formats are 4 x 10 ft (1220 x 3050 mm) and 4 x 12 ft (1220 x 3660 mm), used where fewer horizontal joints matter, such as tall wall cladding and high concrete pours. These are order-in items at many yards rather than everyday stock, so confirm availability before specifying.
What plywood thickness should I use for a subfloor?
For a residential subfloor over joists at 16 inches on centre, 3/4 inch (18 mm) is the usual choice. Wider joist spacing calls for a thicker panel or closer support to keep deflection in check. Follow local building code, which may set a minimum thickness and span rating for your joist layout.
