How to read a cut list before you buy lumber

A cut list gives finished sizes, not shopping sizes. Work through it in order: grain direction, kerf, sheet yield and cut sequence, and you will walk into the lumber yard knowing exactly what to put in the cart.

Published by Checked by Us · Published: September 22, 2026 · How we check

A cut list is a table of parts: quantity, name, thickness, width and length. It looks like a shopping list and it is not one. Every number on it is a finished dimension, measured after the part has been cut, planed and sanded, and after the saw has eaten its share of the board.

The gap between the cut list and the receipt is where most first projects lose money. Someone adds up 42 linear feet of 1x4, buys 42 feet, and runs out halfway through because of saw kerf, snipe, a crooked board and one part cut with the grain running the wrong way. Reading the list properly takes about fifteen minutes at the kitchen table and it saves a second trip.

Step one: separate finished sizes from nominal sizes

A cut list that says 3/4 x 3 1/2 x 24 is describing a part that is actually three quarters of an inch thick. The board you buy to make it is sold as a 1x4, which measures 3/4 by 3 1/2 after milling. Those are the same thing written two ways.

Trouble starts when the list gives a width the yard does not sell. A part listed at 3/4 x 6 x 30 does not come from a 1x6, because a 1x6 is 5 1/2 wide. You either rip it from a 1x8, glue up two narrower boards, or cut it from plywood. Scan the whole list for widths that are not 3 1/2, 5 1/2, 7 1/4, 9 1/4 or 11 1/4, and decide right now where each of those parts is coming from.

1. Go down the width column and circle every width that is not a standard milled size.
2. For each circled part, write the board you will rip it from, or mark it as a plywood part.
3. Check the thickness column: anything other than 3/4 or 1 1/2 means milling rough stock or resawing.
4. Confirm the longest part in the list fits a length the yard stocks, usually 6, 8, 10 or 12 feet.

Step two: read the grain direction in the part names

Good cut lists tell you which way the grain runs, either with a note column or by the convention that length is always along the grain. If the list is silent, assume length follows the grain and check whether that makes sense for the part.

For plywood the grain direction of the face veneer is the same idea, and it matters structurally. A shelf cut with the face grain running across the short dimension is measurably floppier than the same panel cut the long way, because the plies that run the length of the sheet are the ones doing the work. Cabinet sides and doors also look wrong when the veneer runs the unexpected way, and there is no fixing it after the cut.

In solid wood, grain direction decides where the piece moves. A board expands and contracts across its width with the seasons and almost not at all along its length, which is why plans put a slot or a floating panel where a wide part is held on both ends.

• Length in a cut list normally runs with the grain. If a part is wider than it is long, the list should say which way.
• Plywood face grain runs the 8 foot direction of a standard 4 by 8 sheet.
• Shelves, stretchers and rails want grain along their length for stiffness.
• A wide solid panel needs room to move across its width: about 1/8 in per foot of width in a house with seasonal humidity swings.

Step three: add the kerf back in

The saw removes material. A standard 10 inch table saw blade cuts a kerf around 1/8 in wide. A thin kerf blade takes about 3/32. A circular saw is usually close to 1/8, and a track saw similar. A bandsaw takes less, often 1/16 or under.

That sounds trivial until you count the cuts. Eight parts at 12 inches each out of a 96 inch board is not eight parts. Seven cuts at 1/8 in is 7/8 of an inch gone, plus whatever you trim off the crooked factory end, so the board comes up short on the last piece. This is the single most common reason a beginner runs out of wood.

Plywood has the same issue amplified, because a sheet is 96 by 48 and people plan parts that add to exactly 48. Four 12 inch shelves out of one sheet width does not work once the blade has taken three kerfs out of it.

1. Write your blade kerf at the top of the list, measured on a scrap rather than assumed.
2. Count the number of cuts each board or sheet needs, not the number of parts.
3. Multiply cuts by kerf and add that to the material length for that board.
4. Add a trim allowance at each end of every board, about one inch, for the factory end and any damage.
5. Add 10 to 15 percent on top for waste on a simple layout, more if the design has angles or if you are matching grain.

Step four: lay the parts onto real boards

This is the part people skip, and it is the part that turns a cut list into a shopping list. Take the parts and group them by the board they will come from, longest first. A sheet of plywood gets the same treatment: sketch the 48 by 96 rectangle on paper and draw the parts into it in the orientation the grain requires.

Two things fall out immediately. You find out how many boards and sheets you actually need, usually one more than the arithmetic suggested. And you find out whether a part is impossible, such as a 50 inch wide panel from a 48 inch sheet, which is better discovered at the table than at the saw. Assign small parts like cleats and edge strips to the leftovers of the big cuts rather than to a new board.

• Longest parts get assigned first; short parts fill the remainder.
• Keep parts that must match in color or grain together on the same board.
• A 4 by 8 sheet does not fit in most cars. Ask the yard to break it down to rough sizes, oversize by about a half inch, and finish the cuts yourself.
• Buy one extra board of anything you are ripping to width. Ripping exposes tension in the wood and boards can move as you cut.

Step five: work out the cut order

Cut order is not arbitrary. Work from the parts that set the size of everything else, and cut to final length as late as you sensibly can.

Parts that must match, like four legs or a pair of doors, get cut in one setup without moving the fence or the stop. If they end up a sixteenth off the plan, that is fine, as long as they are all a sixteenth off in the same direction.

1. Rough crosscut boards to about an inch longer than the parts they hold.
2. Flatten or straighten one face and one edge before any final dimension.
3. Rip all parts to final width in one session, fence untouched between matching parts.
4. Crosscut to final length using a stop block for repeat parts.
5. Cut joinery last, and mark every part with its name from the list as it comes off the saw.
6. Leave parts that fit into an opening, such as drawer fronts or a back panel, until the opening exists and can be measured.

What the cut list does not tell you

A cut list covers wood. It does not cover the rest of the receipt, which is usually a third of the cost on a small project. Add the hardware line by line from the drawing, then glue, abrasives and the finish.

A plan is worth having mostly because someone already did the layout work above: parts, grain direction, joinery detail and hardware in one place. Free plans are widely available and many are usable, though their cut lists vary in quality and some skip grain direction. Paid plan libraries sell volume and consistency.

• Screws: length should be roughly three times the thickness of the part being held.
• Glue: standard yellow PVA for interior work, 30 minutes of clamping minimum.
• Abrasives: 100, 150 and 220 grit covers most projects before a finish.
• Finish: primer plus enamel for painted work, oil or wipe on polyurethane for clear.

The short version

Read the cut list as finished sizes, translate each one into a board the yard sells, add the kerf and the trim, then lay the parts onto real boards before you spend anything.

Then cut in order: rough length, flatten, rip to width, crosscut to length, joinery last. Most beginner projects that go sideways went sideways at the shopping stage, not at the saw.