How to cut plywood with the least waste

Plan before you cut

The single biggest source of plywood waste is cutting before you have thought the whole project through. A part you forgot, a size you got wrong, or a piece cut from the middle of a sheet can leave you short and force you to open a new panel.

So make a complete cut list first. Write down every part you need with its length, width and quantity, and give each one a name so you can match it to the drawing later. With the full list in front of you, you can see the project as a packing problem rather than a series of one-off cuts, and that is exactly where the savings come from.

Group by material and thickness

You cannot nest a 12 mm shelf onto the same sheet as an 18 mm cabinet side, and you would not want to mix birch plywood with painted MDF. Before you plan a layout, sort your parts into groups that share the same material and the same thickness.

Each group then gets packed onto its own set of sheets. This keeps the plan honest (you only count sheets you will actually buy) and it stops the optimizer from trying to combine parts that can never share a panel. It also makes your shopping list clear: so many sheets of 18 mm, so many of 12 mm.

Let an optimizer pack the sheets

Arranging parts on a sheet by hand works for two or three pieces. Past that, it gets hard fast, and small choices early on push later parts onto an extra sheet. This is where a cut optimizer earns its keep: it tries several packing strategies, rotates parts where allowed, and keeps the layout that fits everything onto the fewest sheets.

A good rule of thumb is to cut the big pieces first and the small ones after. Place your largest parts where they make full use of a sheet, then fill the gaps. The tool does this packing for you, but the same logic applies if you ever sketch it out: large parts set the structure, small parts fill in around them.

Account for the kerf and grain

Every cut turns a thin strip of plywood into sawdust. That strip, the kerf, is usually 2 to 3 mm wide with a circular saw blade. Ignore it and each part comes out a little undersized, and across many cuts the loss adds up to a missing strip or even a whole sheet. Set the kerf once and let the plan include it on every cut, so your parts come out to size.

Grain matters too. Plywood has a visible face grain, and on cabinet sides, doors and other surfaces that show, you want it running the same way. Mark those parts as grain-fixed so they keep their orientation. Hidden parts (backs, bottoms, cleats) can rotate freely, which gives the optimizer more room to pack tightly.

Use your offcuts

The leftover strips from one project are stock for the next. Before you cut into a fresh sheet, use the offcuts you already have, and nest small parts into the leftover strips that any layout produces. A panel that would have become scrap turns into shelves, dividers or drawer parts.

Add the offcuts you own to the plan and they get used first, so you buy fewer full sheets. Over a few projects this is where plywood really stops going to waste: nothing usable gets thrown away, and the cut-offs from today become the small parts of tomorrow.

Frequently asked questions