Plywood Cut List Optimizer
Standing at the lumberyard counter trying to decide if four sheets is enough. Last project you ran short by half a sheet, drove back, paid for delivery again, lost a day. The project before that you bought six, used three and a half, and the leftovers are still leaning against the wall.
A cut list optimizer is the difference between guessing and knowing. For plywood specifically, the calculations matter because the sheets are expensive, the waste is heavy, and the leftover scrap is hard to repurpose.
Why plywood needs different optimization than other sheet goods
Plywood has grain direction. The face veneer runs along the long axis of a 4×8 sheet. Side panels of cabinets should run grain top-to-bottom for visual continuity. Shelves and bottoms can be oriented either way because they're hidden or non-grain-critical.
The optimizer needs to know which pieces are grain-locked (can't rotate 90°) and which are rotation-free. EZNESTING handles this per-piece — flag a piece as grain-locked and the algorithm keeps its long axis aligned with the sheet's long axis.
Most free cut list calculators treat every piece as freely rotatable. That gives you a tighter-looking layout on screen and a visually mismatched cabinet in the shop.
Worked example: 12 cabinet sides + bottoms from 4×8 sheets
A typical kitchen cabinet job:
- 12 sides @ 23" × 30" (grain locked along the 30")
- 6 bottoms @ 22" × 23" (grain free)
- 6 backs @ 23" × 29" (grain free)
- 6 shelves @ 22" × 22" (grain free)
With everything freely rotatable, the optimizer fits these into about 2.4 sheets. With grain locked on the sides, it needs 2.7 sheets. The grain constraint costs you roughly one-third of a sheet — about $25 on $80 plywood. Worth it for matching grain on the visible faces.
EZNESTING shows utilization per sheet and a visual layout so you can see exactly where each piece lands.
How kerf affects plywood waste
Standard table saw or panel saw kerf is 1/8" (3.175mm). A track saw with a thin-kerf blade is closer to 5/64" (2mm). CNC routers use bit diameter, typically 1/4" (6.35mm) or 3/8" (9.5mm), which is much wider than a saw kerf.
Set the kerf in EZNESTING and the optimizer leaves space between adjacent pieces in the layout. Setting kerf to zero looks like better utilization on screen but the cut pieces won't fit — every cut removes material the optimizer didn't account for.
Rule of thumb: measure your blade or bit rather than guessing. A miscounted kerf on a 12-piece cut list compounds.
Edge banding planning
EZNESTING tracks which edges of each piece need banding (left, right, top, bottom). When you export, you get the total linear length of edge tape needed for the job.
For a 10-cabinet kitchen, that's typically 80-120 linear feet of edge tape. Order it ahead of time instead of mid-project. Edge banding suppliers often ship same-day for standard PVC and ABS, but if you need pre-glued PUR or wood veneer, lead times stretch to a week.
For cabinet ends that meet a wall, you only need to band the front edge — track that on a per-piece basis instead of banding every cut piece by default.
CSV import from your design software
Most cabinet design tools — CutList Plus, SketchUp Cutlist plugins, custom spreadsheets — export a parts list. EZNESTING reads CSV and Excel directly with smart column mapping: it auto-detects columns for length, width, quantity, label, and edge banding flags.
Set up the mapping once and the next job's a 30-second upload. The optimizer handles unit detection (inches vs. millimeters) and fractional inch notation like 24 1/2.
If you're still doing this in a spreadsheet, the how to import Excel and CSV cut lists guide walks through the conversion.