MDF Cut List Optimizer

Three things change when you swap plywood for MDF:

• No grain direction: every piece can rotate 90°. This unlocks roughly 5-10% better utilization vs. the same job in plywood with grain-locked sides.
• Heavier per sheet: a 4×8 of 3/4" MDF weighs about 95 lbs vs. 60-75 lbs for plywood. Buying one extra sheet "to be safe" is a real physical burden, especially solo.
• Higher dust generation: planning the right number of sheets means fewer pulls from inventory and fewer total cuts. Less dust exposure matters even with a good extractor running.

MDF also doesn't void warranties or chip out the same way melamine does, so the cutting strategy is less finicky.

A paint-grade kitchen with 24 inset MDF doors:

• 12 doors @ 14" × 22" (rotation free, no grain)
• 12 doors @ 14" × 28" (rotation free)
• 6 drawer fronts @ 22" × 6.5"

Running this through EZNESTING with a 1/8" kerf and full rotation freedom: 3 sheets of 4×8 MDF at 67.0% yield. The first two sheets pack at 83% and 86%. The third carries the leftover doors and drawer fronts at about a third full. That third sheet is mostly offcut you can keep for the next job. Area math (9,258 sq in of parts ÷ 4,608 per sheet = 2.01 sheets) tempts you to buy two and squeeze. The layout shows two sheets can't hold it.

Turning rotation off, which is what you'd do for grain-matched plywood, gives the same 3 sheets on this list. The parts are small next to the sheet, so they fill it either way.

MDF resin is hard on blades. Standard 80-tooth ATB blades work for the first few sheets, then start tearing on the bottom face. Triple-chip grind (TCG) blades stay sharp through 30-40 sheets of MDF before needing service. Kerf is the same 1/8" as for plywood with a standard 10" blade.

If you're on a CNC router, a 1/4" compression bit is the standard for cabinet-grade MDF. Set the kerf in EZNESTING to match your bit diameter — 6.35mm for a 1/4" bit.

Resin loading also raises the "real" kerf slightly on dull blades — if your last few cuts have been measuring 1/16" wider than you expect, the blade's due.

MDF takes ABS, PVC, and PUR edge banding the same way plywood does — apply with heat-activated adhesive, trim flush. The visual result is less convincing than plywood because the MDF core is uniform brown, so wood-grain edge tape looks like an obvious applique.

For paint-grade work this doesn't matter — the entire piece gets primed and painted, edge banding included. For stain-grade work, use solid wood edging or skip MDF entirely.

EZNESTING tracks edge banding requirements per piece. Export the cut list and you'll see total linear feet of tape needed alongside the optimization.

Three places MDF optimization pays back:

• Cabinet boxes for paint-grade work: full sheet stock, predictable pieces, lots of repeat cuts
• Built-in shelving systems: long shelves cut from the long axis of the sheet
• Door panels (5-piece doors): center panels of shaker doors

For curved or routed-edge work like cathedral doors, MDF is the standard material, and cut list optimization matters even more because the routing process tolerates no shortage mid-job.