Standard sheet sizes
Plywood, MDF, particleboard and melamine come in a handful of standard sizes that vary by product and region. A larger sheet is not automatically cheaper for a job. What matters is how much board you buy and how much of it becomes parts.
Common sizes
Sizes are nominal. Measure a sheet before you lay out tight parts: a board sold as 8 × 4 ft may be 2440 × 1220 or 2438 × 1219 mm, and the edges of large boards are often knocked in handling, which is what trim is for.
| Size (mm) | Size (ft) | Typical use |
|---|---|---|
| 2440 × 1220 | 8 × 4 | Plywood, MDF and OSB worldwide; CutGrid’s default |
| 2500 × 1250 | about 8.2 × 4.1 | Birch plywood and panels in Europe |
| 2800 × 2070 | about 9.2 × 6.8 | Particleboard and melamine-faced board in Europe |
| 3050 × 1220 | 10 × 4 | Long plywood and MDF for tall parts |
| 3660 × 1830 | 12 × 6 | Large-format MDF and particleboard in some markets |
Same job, three sheet sizes
Three 600 mm base cabinets, 21 parts, with a 3 mm kerf, 10 mm trim and rotation allowed. Only the sheet size changes.
| Part | Width (mm) | Height (mm) | Qty |
|---|---|---|---|
| Side | 560 | 720 | 6 |
| Bottom | 564 | 560 | 3 |
| Top | 564 | 560 | 3 |
| Shelf | 564 | 540 | 3 |
| Back | 600 | 720 | 3 |
| Door | 596 | 716 | 3 |
| Sheet | Sheets | Board bought | Waste |
|---|---|---|---|
| 2440 × 1220 mm | 4 | 11.91 m² | 34.5% |
| 2800 × 2070 mm | 2 | 11.59 m² | 32.7% |
| 3660 × 1830 mm | 2 | 13.4 m² | 41.7% |
Reading the comparison
Fewer sheets is not the goal. The 3660 × 1830 mm layout uses 2 sheets but buys 13.4 m² of board, because its last sheet is mostly offcut. The 2800 × 2070 mm layout buys 11.59 m² and the 2440 × 1220 mm layout 11.91 m².
Price per square metre is rarely the same across sizes, so compare cost, not area: multiply each layout’s sheet count by that sheet’s price. CutGrid does this when you enter a cost per sheet.
Large sheets have other costs. They need two people or a vertical panel saw, and a 3660 mm sheet does not fit in every van.
Layout produced by CutGrid’s optimizer for this example. Coloured blocks are parts, dashed areas are offcuts, and the outer band is trim.
- Side
- Bottom
- Top
- Shelf
- Back
- Door
When the bigger sheet wins
Large sheets help when parts are big relative to a small sheet, such as wardrobe sides around 2000 mm tall, which a 2440 × 1220 mm sheet holds only lengthways. They help less when parts are small and many, because small parts already pack well on any sheet.
Offcuts from large sheets are also more useful. A long strip from a 2800 mm sheet can still give a full-height side.
Common mistakes
Comparing sheet counts
Two large sheets can cost more than four small ones. Compare the board you buy or, better, the cost.
Ignoring the last sheet
If the last sheet is mostly empty, its offcut is the real cost of that size. Plan another job onto it or pick a size that leaves less.
Assuming the same size everywhere
A layout planned for 2440 × 1220 mm is wrong on 2500 × 1250 mm board, and the other way round. Set the stock size to what is on the rack.
Questions
- What size is a sheet of MDF?
- 2440 × 1220 mm is the most common worldwide. Larger formats such as 2800 × 2070 and 3660 × 1830 mm are common for MDF and particleboard in some markets.
- Is a 4 × 8 sheet exactly 2440 × 1220 mm?
- Not quite. 4 × 8 ft is 1219.2 × 2438.4 mm. Many products are sold as 2440 × 1220 mm; measure before cutting parts to the millimetre.
- Can I mix sheet sizes in one job?
- Yes. In a project, add each size to the stock list with its quantity and cost, and the layout chooses from what is available.