Plywood Cut List Calculator

Plywood Cut List Calculator for cabinets, bookcases and built-ins. Enter part sizes, grain and saw kerf to see the sheets to buy, the cut diagrams, the sheet yield and sheet costs.

Plywood Cut List Calculator for Cabinet and Bookcase Parts

The Plywood Cut List Calculator lays your parts out on full sheets and tells you how many sheets to buy. It then draws each sheet and lists the cuts in order. It suits anyone breaking down 4 × 8 plywood for cabinets, bookcases, built-ins or shop furniture on a table saw or track saw.

Enter the sheet size, your blade's kerf and the price per sheet. Then list each part by finished width, length and quantity, and set whether its grain must run along its length. The defaults describe a small bookcase, with two 72 inch sides, six shelves, a top, a back and a toe kick.

Sheet size means the real panel you will buy. The Hardwood Plywood and Veneer Association's standard, ANSI/HPVA HP-1-2024, lists 48 × 72, 48 × 96 and 48 × 120 inches as common hardwood plywood sizes. It holds width and length to plus or minus 1/32 inch of the stated size.

Rip-First Strips and Crosscut Parts

The tool plans cuts the way a table saw works. It rips each sheet into strips along its length, then crosscuts parts from each strip. Parts are sorted widest first, and each one goes into the first strip with room for it.

A strip holds parts only while their widths and the kerfs between them fit inside the usable sheet width. The same test decides how many strips fit across one sheet.

$$\sum _{i=1}^n{w}_i+(n-1)k\le W-2t$$

Here w is each part's width, k is the kerf, W is the sheet width and t is the edge trim per side. On the first default sheet, the 35-1/2 inch back and the 12 inch top share the width. With a 1/8 inch kerf between them they use 47-5/8 of the 48 inches.

Layout set to Fewest Sheets tries rip-first and crosscut-first plans, with grain-free parts turned both ways. It keeps the plan with the fewest sheets, then the one that leaves the last sheet emptiest. The default bookcase needs three sheets, with only one shelf on the third.

The third card counts the cuts. The default plan has 20 saw cuts, 9 of them rips, and about 73.6 feet of blade travel. Open Cut Diagrams and Cut Order for a drawing of each sheet and numbered steps, starting with the rip widths.

Grain Direction Can Cost a Whole Sheet

A USDA Forest Service plywood overview notes that stock 4 × 8 sheets have the 8 foot side parallel to the face grain. The tool assumes the same. A part set to Along Length must have its length running down the sheet, which stops it from turning to fill a gap.

That rule matters more than most people expect. With the sides and shelves grain-locked, the default bookcase needs 3 sheets at 50.9% yield. Set every part to Any Direction and the same parts fit on 2 sheets at about 76% yield.

Keep grain locked on parts that will show, such as sides, shelves and doors. Free it on backs, drawer bottoms, cleats and anything that will be painted. The default back and toe kick are already set to Any Direction for that reason.

Edge Trim in the Plywood Cut List Calculator

Factory edges are rarely good reference edges. HP-1 lets a panel over 4 × 4 feet be out of square by up to 3/32 inch, measured as the difference between its diagonals. An 8 foot edge may also bow up to 1/16 inch from a straight line between its corners.

Cabinetmakers on the LumberJocks forum report beveled and out-of-square factory edges even on cabinet-grade sheets. Several trim them off before cutting parts. A WOODWEB cabinetmaking thread describes ripping a 6 mm dust cut off a long edge to start square.

Edge Trim per Side removes that strip from all four edges before parts are laid out. Enter the full width you take off, saw kerf included. A 1/8 inch trim clears the 1/16 inch straightness allowance with room to spare, and the default bookcase still fits on three sheets even at 1/2 inch.

Sheet Yield, Offcuts and Plywood Cost

The first card shows how much of the plywood you buy becomes parts. The default bookcase uses 48.9 of 96 square feet, a 50.9% yield. Kerf takes about 0.8 square feet, the length of every cut times the blade width.

The second card lists the largest offcut and how many offcuts are worth keeping. The tool counts an offcut as usable if it is at least 3 inches wide and 1 square foot in area, which is its own threshold rather than an industry rule. The default plan leaves a 36-5/8 × 96 inch piece and eight usable offcuts in all.

Those offcuts can cover smaller jobs. The Drawer Box Calculator sizes drawer parts that often fit in them. For long shelves, check the Shelf Span Calculator before cutting, since a shelf that sags is wasted plywood too.

The fourth card prices full sheets. Three sheets at $65 cost $195.00, or $17.73 per part, and $95.70 of that pays for offcuts and sawdust. When the last sheet's parts fit on a 4 × 4 half sheet, the tool suggests buying two full sheets and one half instead.

Measuring Plywood Before the First Cut

Is 3/4 inch plywood actually 3/4 inch thick?

Often not. HP-1 treats 3/4 as a thickness class, not a measurement, and lets a 3/4 class panel run up to 3/64 inch thin. The manufacturer must still state the actual thickness, which is why labels read 23/32 or 18 mm.

The gap changes part sizes. A shelf between two sides on a 36 inch wide case is 34-1/2 inches with true 3/4 plywood but 34-9/16 inches with 23/32. One LumberJocks member cut dadoes for sheets labeled 23/32 that turned out to be a full 3/4, so measure with calipers first.

Which way does the grain run on a 4 × 8 sheet?

Along the 8 foot length on standard stock sheets. A Structural Building Components Magazine column on panel strength axis says the face grain generally runs the long way unless the panel is marked otherwise. Check the sheet before trusting the tool's assumption.

If your sheet's grain runs the short way, swap the width and length of every grain-locked part. The layout will then keep their grain running across the sheet.

Why are some sheets 49 × 97 inches?

So they can be trimmed square and still yield full-size parts. A LumberJocks cabinetmaker notes that dealers serving cabinet shops sell melamine at 49 × 97 inches and prefinished plywood at 48-1/2 × 96-1/2 inches. Those are sizes from dealers who supply cabinet shops, not big box stores.

Pick the 49 and 97 inch presets and add your trim to plan with oversize stock. For a quick sheet count by area alone, the Plywood Calculator gives a faster estimate before you list every part.