Thickness decision
Quick answer
7/16 inch is thinner than 1/2 inch by exactly 1/16 inch. In decimal and metric terms, 7/16 is 0.4375 inch (11.1125 mm), while 1/2 is 0.500 inch (12.7 mm). They are not the same dimension and should not be swapped in a dado, hardware opening or code-specified assembly without checking the design.
7/16 is commonly encountered as a structural-panel Performance Category. Cabinet plywood labeled 1/2 inch may be sold to a metric specification such as 12 mm. The right choice therefore depends on the panel stamp, actual measured thickness, core and project—not the fraction alone.
7/16 vs 1/2 at a glance
| Question | 7/16 inch | 1/2 inch | What to verify |
|---|---|---|---|
| Exact fraction | 7/16 | 8/16 | The difference is 1/16 inch. |
| Decimal | 0.4375 in. | 0.5000 in. | Do not round both to “about half inch” for joinery. |
| Metric conversion | 11.1125 mm | 12.7 mm | A stocked cabinet panel may instead be specified as 12 mm. |
| Typical label context | Structural sheathing Performance Category | Structural or cabinet-panel trade label | Read the complete stamp or product page. |
| Cabinet use | Not a standard Berta cabinet-panel option | Useful for lighter cabinet parts when the construction calls for it | Core, faces, finish and hardware compatibility. |
| Structural use | Depends on grade, span rating and assembly | Depends on grade, span rating and assembly | Never choose from thickness alone. |
Why the labels can be misleading
For APA Rated Sheathing, “Performance Category” connects a nominal thickness family to code references and qualified performance. The panel can carry a decimal thickness value and a separate span rating. That is different from a cabinet supplier describing a panel as 1/2 inch (12 mm).
7 ÷ 16 = 0.4375
8 ÷ 16 = 0.5000
0.4375 × 25.4 = 11.1125 mm
0.5000 × 25.4 = 12.7 mm
Berta’s actual-versus-nominal plywood thickness chart is the broad conversion reference. The 1/2-inch plywood 4×8 guide focuses on cabinet applications, while the load, span and support selection method explains why a fraction cannot replace project engineering.
Which thickness belongs in a cabinet project?
1. Start with the part
A cabinet back, drawer bottom, box side and shelf do different work. Define the span, support and hardware before selecting a panel.
2. Use the product specification
If the panel is listed as 12 mm, design the groove or CNC operation around 12 mm—not an assumed 12.7 mm.
3. Measure the delivered sheet
Use calipers at several locations. Coatings, sanding and manufacturing tolerance affect the fit of close joinery.
Browse the verified 1/2-inch plywood collection when your cabinet design calls for this class of panel. Compare it with the full cabinet-grade plywood range, or narrow by finish in the prefinished plywood collection. The thickness calculator, cut-list calculator and plywood FAQ help turn the material decision into a sheet plan.
Current 1/2-inch cabinet-panel comparisons
Prefinished birch — 1/2 inch (12 mm)
A 4×8 cabinet-grade panel with a multi-ply poplar core and clear UV-cured birch finish on both faces. It solves a different problem from 7/16 structural sheathing: finished cabinet components rather than a stamped structural assembly.
Check the 12 mm birch panel
BB/BB Baltic Birch — 1/2 inch (12 mm)
An unfinished 4×8 BB/BB panel with solid birch multi-ply construction. Choose it when two usable birch faces, machined edges or finishing flexibility matter. Measure before routing close-fitting joinery.
Check the 12 mm BB/BB panelNeed a sheet count?
Once the part dimensions and grain direction are fixed, calculate sheets and waste. This prevents a thickness comparison from becoming an incomplete buying decision.
Open Berta project calculatorsProduct specifications and exact variant images were verified on November 13, 2026. Confirm current availability and pricing on the product page.
Do not make these substitutions
- Do not replace rated sheathing with cabinet plywood. Cabinet appearance and core quality do not establish a structural span rating.
- Do not replace a 12 mm cabinet panel with 7/16 material without redrawing joints. The dimensional difference can loosen a dado or change hardware fit.
- Do not treat “1/2 inch” as a guaranteed caliper reading. Use the metric specification and measured sheet for precision work.
- Do not size shelves from thickness alone. Span, load, edge treatment and support layout all matter.
7/16 and 1/2 plywood FAQ
Is 7/16 plywood the same as 1/2 inch?
No. 7/16 is 0.4375 inch; 1/2 is 0.500 inch. The difference is 1/16 inch.
How many millimeters is 7/16 plywood?
The exact mathematical conversion is 11.1125 mm. A manufactured panel’s actual thickness must still be checked against its stamp and measured.
Can 7/16 be used for cabinet boxes?
It is not a standard Berta cabinet-panel thickness. A structural 7/16 panel may also have faces and a core intended for sheathing rather than visible casework. Use the cabinet design and verified panel specification.
Is a 12 mm panel exactly 1/2 inch?
No. Twelve millimeters is about 0.4724 inch, roughly 0.0276 inch under an exact half inch. “1/2 inch (12 mm)” is a trade label; use 12 mm for precision joinery.
Which is stronger, 7/16 or 1/2?
Thickness alone cannot answer that. Species, layup, span rating, grade, strength axis and support conditions all affect structural performance.
Source and scope notes
Fraction and metric values are direct arithmetic. Structural-panel terminology was checked against APA’s grade-stamp reference and the NIST-hosted PS 2 performance standard. This article is a material-selection guide, not structural engineering or a substitute for code documents.
