What thicknesses does birch plywood come in?
Metric: 3, 4, 6, 9, 12, 15, 18, 21, 24, and 30 mm. Imperial: 1/8″, 1/4″, 3/8″, 1/2″, 5/8″, 3/4″, and 1″. Some mills also produce 8 mm and 25 mm. Vietnamese mills supply both systems; Baltic mills are metric only.
Is 15/32 thicker than 23/32?
No. 15/32″ equals 11.9 mm. 23/32″ equals 18.3 mm. The 23/32″ panel is about 6.4 mm thicker. Both are common nominal callouts for what most retailers label as 1/2″ and 3/4″ structural plywood.
Which is thicker, 5/8″ or 3/4″ plywood?
3/4″ is thicker. 5/8″ measures 0.625″ (15.88 mm); 3/4″ measures 0.750″ (19.05 mm). The gap is 1/8″, or 3.2 mm. Actual measured thickness can run a touch under for both, but the relationship between them holds.
Why is birch plywood expensive?
Birch face veneer comes from slow-growing northern forests, gets graded for tight knots and clean colour, and runs through more plies per inch than utility plywood. The veneer cost, the calibration-sanded finish, and the supply contraction following sanctions on Russian and Belarusian birch all push the per-sheet price above CDX or BCX softwood plywood. Vietnamese plantation birch typically lands 20–35% below Baltic on equivalent thickness.
Does Baltic birch come in 3/4″?
True Baltic mills produce 18 mm only. North American distributors sometimes label 18 mm bundles as "3/4″ Baltic birch" for shelf-tag convenience — the panel inside is still 18 mm and will measure about 0.7 mm under a true 3/4″ panel. Confirm the dimension on the invoice if the project needs full 3/4″.
What is the tolerance on birch plywood thickness?
EN 315 allows ±0.4 mm on panels up to 12 mm and ±0.5 mm on thicker panels at the time of manufacture. ANSI/HPVA HP-1 sets imperial-system tolerances at roughly ±1/64″ for hardwood plywood. Both standards measure the panel after calibration sanding, not as it leaves the press.
