What Is a Cut List Optimizer?
A cut list optimizer is software that takes a list of parts — each with a width, height, quantity and any grain restriction — and works out the most efficient way to arrange them on your sheet stock. Instead of sketching layouts on the back of an invoice, you get an exact, printable cutting plan in seconds.
For a workshop, this isn't just convenience — it's material cost. Cutting without a plan typically wastes 15–35% of a sheet. A good optimizer usually gets that down to under 10%.
Metric Tool, Imperial-Friendly: Converting 4×8 Sheets to Millimetres
The optimizer itself works entirely in millimetres — that's true whether your local timber merchant is in Dublin, Leeds, Brisbane, Auckland or Chicago. If you're used to thinking in feet and inches, that's not a dead end: it just means converting your sheet and part sizes to mm before you type them in. A standard US 4×8ft sheet is 1219×2438mm — see the table below for that and the other sizes used in each of these markets, plus a quick reference for converting your own measurements.
| Sheet size | Common name | Typical use |
|---|---|---|
| 2440 × 1220mm | Standard sheet | MDF, plywood, melamine — most common size in IE/UK |
| 2800 × 2070mm | Jumbo sheet | Large melamine/particleboard runs, fewer joins |
| 2400 × 1200mm | AU/NZ standard | Most common size stocked by Bunnings, Mitre 10, Placemakers |
| 3600 × 1200mm | Extended sheet | Larger AU panel product, less common |
| 1219 × 2438mm (4 × 8ft) | US standard | Most common size stocked by Home Depot, Lowe's and most US lumber yards |
Always check the exact size your supplier stocks before running your cut list — a few millimetres of difference changes the whole layout.
Grain Direction — Why It Matters
Grain, or the printed woodgrain pattern on melamine and laminate, needs to run in a consistent direction on visible parts — cabinet doors, ends and face panels usually need vertical grain. Shelves, backs and other hidden parts usually don't.
A proper optimizer lets you flag which parts must respect grain and which can rotate freely to save material — rotating a part 90° can be the difference between fitting one more shelf on a sheet or not.
Kerf — The Millimetres Your Saw Blade Removes
The kerf is the width of material turned to dust by each cut. A panel saw typically has a 3–4mm (~1/8in) kerf; a hand-held circular saw is often wider, 3.5–4.5mm (~5/32in). CNC routing with a larger cutter can go up to 6–8mm (~1/4–5/16in).
Ignore the kerf and your parts come out smaller than planned. On a run of 12 cuts at 3.2mm kerf, that's over 38mm (1.5in) of material gone — enough to throw off a tight-fitting drawer front.
| Saw type | Typical kerf | Imperial (approx.) | Precision | Common use |
|---|---|---|---|---|
| Hand-held circular saw | 2.5 – 3.5mm | ~3/32 – 1/8in | Medium | DIY / site work |
| Panel saw / table saw | 3 – 4mm | ~1/8 – 5/32in | High | Professional workshops |
| Bandsaw | 1 – 2mm | ~1/32 – 1/16in | Medium | Curved parts |
| CNC router | 6 – 8mm | ~1/4 – 5/16in | Very high | Production / batch runs |
Trim Margins
Sheet edges are rarely perfect — a damaged corner, a factory edge that isn't quite square. Leaving a trim margin of 5–10mm around the sheet perimeter before nesting parts avoids basing critical dimensions on a compromised edge.
Importing Your Piece List from a CSV
Export your spreadsheet as CSV
Include columns for part name, width, height, quantity, and grain (yes/no).
Upload the CSV into the optimizer
No need to retype every row by hand — especially useful for kitchen runs or repeat orders.
Check the parts loaded correctly
Confirm dimensions, quantities and grain flags before running the calculation.
Run the optimisation
Use the free online cut list optimizer to generate the layout.
Exporting Your Optimised Plan to PDF
Once the layout is calculated, export it as a PDF — one page per sheet, with every part labelled and dimensioned. Print it for the workshop floor, or pull it up on a phone next to the panel saw. It's also worth keeping as a record for the job in case a part needs to be recut later.
Once each part comes off the saw, a matching QR label speeds things up further — see our guide to wood piece labels with QR code and production route.
What Sheet Material Costs
Prices vary by supplier, sheet type and finish, but here's a real snapshot to work from — for a standard 18mm sheet (MDF, plywood or melamine, roughly 2400–2440mm × 1200–1220mm):
| Currency | Typical range | Source |
|---|---|---|
| £ (GBP) | £25 – £45 | Wickes, Essex Board & Timber, August 2026 |
| € (EUR) | €35 – €61 | McMahons, Timber Ireland, Woodworkers.ie, August 2026 |
| AUD$ | $58 – $90 | Blacktown Building Supplies, August 2026 |
| USD$ | $44 – $69 | Home Depot, Lowe's, September 2026 |
We couldn't confirm a reliable current NZD figure for this guide — expect a broadly similar range, but check with your local supplier for an accurate quote, as prices vary by region and stock.
Whatever your market, the maths is the same: cutting 10–20% more efficiently on a job using several sheets adds up fast. Once you've got your optimised sheet count, you can price the whole job — materials, hardware, labour and tax (VAT, GST or sales tax) — without re-typing a single measurement, using our integrated quote calculator.
Common Mistakes to Avoid
Ignoring kerf: the single most common error, and the easiest to fix.
Mixing up grain direction: impossible to fix once cut.
No trim margin: critical dimensions taken from a damaged sheet edge.
Calculating by hand instead of optimising: manual layouts are almost always less efficient than software-generated ones.
Once you've got the concepts down, the fastest way to see them in practice is a full worked example — see our step-by-step guide with real cutting list examples for a complete cabinet cut list from start to finish.
Calculate your cut list now
Enter your sheet size and parts list. The optimizer works out the most efficient cutting plan automatically — free, no sign-up required.
▶ Open the cut list optimizerFAQ
What is a cut list optimizer?
Software that arranges a list of parts on standard sheet sizes to minimise the number of sheets and the wasted material, producing a printable cutting plan.
What sheet sizes does it support?
Any metric size in millimetres — most commonly 2440×1220mm and 2800×2070mm in the UK and Ireland, 2400×1200mm in Australia and New Zealand, and the equivalent of 4×8ft (1219×2438mm) in the US. The tool works in mm only, so convert your imperial sizes to mm first — see the conversion table above.
What is kerf and why does it matter?
Kerf is the material lost to the saw blade on each cut, typically 3–4mm. Leaving it out of your calculations makes parts come out smaller than intended.
How much material can I save?
Unplanned cutting typically wastes 15–35% of material. A good optimizer usually brings that down to under 10%.
Can I use inches or feet instead of millimetres?
No — the optimizer works in millimetres only. If you're working in imperial, convert your sheet and part sizes to mm first (for example, a standard 4×8ft sheet is 1219×2438mm). See the conversion table above for the most common US sizes and kerf widths.