Quick answer
5 mm Baltic Birch plywood is the metric thickness sold by Berta as nominal 3/16 inch. It is a thin, unfinished BB/BB panel for captured drawer bottoms, cabinet backs, templates, jigs, lightweight panels and CNC parts. It is not a substitute for 1/2- or 3/4-inch structural cabinet sides and shelves.
Five millimeters converts to about 0.197 inch, so it is thicker than an exact 3/16 inch (0.1875 inch) by roughly 0.009 inch. Treat the inch label as nominal: measure the delivered sheet and cut grooves or CNC files around the actual panel.
Choose 5 mm Baltic Birch because the part needs a thin, stable multi-ply panel—not because “3/16” sounds close enough. Design support, grooves and hardware around the measured sheet.
5 mm vs 3/16 inch: the conversion
Exact 3/16 inch = 0.1875 inch
Difference ≈ 0.0094 inch (about 0.24 mm)
That difference is small for a cabinet back held by screws or staples, but it can matter in a snug drawer-bottom groove, laser/CNC file or slip fit. The product label and the physical sheet serve different purposes: the label identifies the option; the measured sheet controls the cut.
Berta’s Baltic Birch thickness chart compares metric options across the line. For a broader 3/16-vs-1/4 decision, use the thin plywood 4×8 comparison.
Where 5 mm Baltic Birch fits—and where it does not
| Part or project | 5 mm suitability | Design requirement | Better alternative when… |
|---|---|---|---|
| Drawer bottom | Good for many small or moderate drawers | Capture in grooves on four sides; match load and span | The drawer is wide, deep or carries heavy tools/food |
| Cabinet back | Good for a captured or applied non-structural back | Use a square cabinet and continuous fastening/support | The back carries wall-mounting loads or braces a large case |
| Template or jig | Good for light templates and repeat layouts | Protect edges and verify flatness | The jig carries clamp pressure or guides heavy routing |
| Decorative panel | Good when fully supported or framed | Allow for movement and finish both faces consistently | The panel spans unsupported or must resist impact |
| Cabinet side / shelf | Not recommended as a normal structural panel | Requires an engineered skin/frame construction | Use 1/2, 3/4 or another thickness designed for the load |
| CNC / laser part | Useful for thin components | Test tooling, hold-down and cut parameters on the actual batch | Small tabs, heat or cutting force damage the thin sheet |
Drawer bottoms: fit the panel to the load
A drawer bottom works as a panel supported by the drawer box. The material does not carry the load by thickness alone; groove depth, engagement on all sides, drawer width and contents all contribute. Berta’s drawer-box plywood thickness chart connects bottom thickness with drawer construction and slide compatibility.
Small utility drawer
Five-millimeter Baltic Birch can work well when the bottom is captured on four sides and the drawer carries light contents.
Wide kitchen drawer
Span and dishes or cookware increase deflection. Use a thicker bottom, a center support or a design verified for the load.
Undermount hardware
Bottom thickness, bottom setback and notch details are slide-model-specific. Follow the slide manufacturer’s drilling and clearance instructions.
Cabinet backs: structural vs non-structural
Five-millimeter plywood is useful as a cabinet back when the case design already carries the load. A captured back in a groove can help keep a small cabinet square, but it should not automatically be treated as the hanging structure for a wall cabinet.
| Back style | How 5 mm is used | What to verify |
|---|---|---|
| Captured in four grooves | Thin panel installed during case assembly | Groove fit, squareness and space behind the back |
| Applied to rear edges | Panel fastened after the box is assembled | Fastener spacing, edge distance and whether the back braces the case |
| Set into a rabbet | Panel sits flush or recessed at the rear | Rabbet depth, remaining case-side strength and fastening method |
| Structural hanging back | Not assumed suitable without engineering | Wall attachment path, cabinet load and manufacturer/engineer requirements |
Machining thin Baltic Birch cleanly
Support the sheet
Use a flat sacrificial surface or zero-clearance support. Thin panels vibrate and can lift near the cut.
Use sharp, appropriate tooling
A fine-tooth saw setup or sharp spiral bit reduces face splintering. Tool choice depends on the machine and cut direction.
Control the show face
Understand where breakout occurs with the specific saw, router or CNC process. Test on an offcut from the same sheet.
Use reliable hold-down
Vacuum tables need enough covered area; small CNC parts may require tabs or an onion-skin pass. Avoid clamps that bow the sheet.
Measure before toolpaths
Enter measured material thickness for grooves, pockets and through-cuts. Nominal 3/16 is an ordering name, not a CNC probe result.
Finish both faces deliberately
The current BB/BB product is unfinished. Seal or finish according to the application, and test appearance on a scrap before production.
5 mm compared with other Baltic Birch thicknesses
| Berta option | Approximate inch conversion | Typical role | Selection note |
|---|---|---|---|
| 5 mm (nominal 3/16) | 0.197 in | Drawer bottoms, backs, templates, light panels | Thin and support-dependent |
| 12 mm (nominal 1/2) | 0.472 in | Drawer parts, light case components, panels | More stiffness and edge material |
| 18 mm (nominal 3/4) | 0.709 in | Cabinet boxes, shelves, furniture and built-ins | Common structural casework thickness |
| 21 mm (nominal 7/8) | 0.827 in | Extra-thick panels and projects designed for 21 mm | Not an exact 0.875-inch panel |
Browse the 3/16-inch Baltic Birch collection, compare the full Baltic Birch selection, or review all cabinet-grade plywood sheets. Use the plywood cut-list calculator for part yield and the plywood and MDF calculator for initial sheet planning.
Related Berta panels
BB/BB Baltic Birch — 5 mm / nominal 3/16
The current Berta listing offers a full 4×8 BB/BB panel, unfinished on both sides, with a solid birch multi-ply core and long grain along the 8-foot direction. Select the 3/16-inch (5 mm) variant; do not rely on the default product image or another thickness when checking edge scale.
Best fit: captured drawer bottoms, cabinet backs, templates, jigs and lightweight components. Check actual thickness, finish plan and support before fabrication.
Select the 5 mm variant
Baltic Birch samples
Use samples to compare BB/BB and B/BB faces, patching, surface feel and finish options before a larger order. The sample page does not replace measuring the production thickness you will machine.
Review sample optionsFor shipment planning, review Berta’s plywood and MDF delivery coverage before ordering full 4×8 sheets.
Common mistakes with 5 mm plywood
| Mistake | Result | Better practice |
|---|---|---|
| Cutting a groove at exact 3/16 inch without measuring | Loose fit or a panel that bows during assembly | Measure and make a test groove |
| Using it as a shelf because it is “Baltic Birch” | Excessive deflection | Choose thickness from span, load and support |
| Leaving a large drawer bottom unsupported | Flex and eventual joint stress | Use thicker material or add support |
| Running small CNC parts without hold-down planning | Movement, chatter or damaged parts | Use tabs/onion skin and validate on scrap |
| Assuming both faces are flawless | Visible patches surprise the installer | Understand BB/BB face allowances and lay out parts |
| Using a generic product image | Edge thickness is misrepresented | Verify the exact 5 mm variant and its specific image/specs |
Frequently asked questions
Is 5 mm plywood the same as 3/16 inch?
It is commonly sold under the nominal 3/16-inch label, but 5 mm converts to about 0.197 inch while exact 3/16 is 0.1875 inch. Measure the sheet for close fits.
Is 5 mm Baltic Birch good for drawer bottoms?
It can be for many small or moderate drawers when captured on four sides. Wide, deep or heavily loaded drawers may need a thicker bottom or added support.
Can 5 mm plywood be used for cabinet backs?
Yes for many captured or applied non-structural backs. Do not assume it provides the wall-hanging load path for a cabinet.
Can I use 5 mm Baltic Birch for shelves?
Not as a normal unsupported shelf. It is a thin panel and will flex. Use a thicker panel or an engineered skin-and-frame construction designed for the load.
How should I cut 5 mm Baltic Birch?
Support it fully, use sharp suitable tooling, control the show face, and test the setup on scrap. Thin sheets need reliable hold-down during CNC work.
Is Berta’s 5 mm panel prefinished?
No. The 5 mm option on the current BB/BB Baltic Birch product page is listed as unfinished on both sides and sanded smooth.
Sources and scope
Berta-specific sheet size, grade, surface, core, thickness options and product imagery are taken from the current BB/BB Baltic Birch product page. Metric conversions use 25.4 mm per inch. Application recommendations are design guidance, not a load rating; drawer, cabinet, hardware and CNC requirements must be checked for the actual project.
