How to read a woodworking plan and cut list: a beginner’s guide

Overall size and piece size are different

Overall width, height and depth describe the assembled object. They are not the dimensions of every board. In our case layouts the sides run full height; the top and bottom fit between them. An overlay back covers the rear edges and is included in overall depth.

For a case 30 inches wide with two actual 3/4-inch sides, the top and bottom are 28 1/2 inches long: 30 − 3/4 − 3/4. Copying 30 inches into that cut would make the case too wide. A desktop template describes the top only, not a complete desk.

Read the cut list: count, thickness, width and length

Our PDF uses T = thickness, W = width, L = length for individual pieces. These are piece dimensions, not the assembled case’s width, height and depth. On a side panel, the piece length follows the case height and its width follows the front-to-back panel depth.

With no back, those side panels use the full 12-inch depth instead. Do not subtract the back twice. Measure the delivered sheet before using this example: nominal 3/4 inch does not guarantee a measured 19.05 mm.

Finished size versus stock size

Finished is the size the piece must have when it fits the assembly. Stock is the material you prepare before final trimming. Extra stock width and length are only the allowances you entered. They do not automatically include the saw’s cut width, defective areas, a cutting layout or a purchase quantity.

A parts list is not a sheet-cutting diagram. Check how the pieces fit on the actual usable sheets, including the cut width and grain direction. The sheet-area calculator estimates an area minimum; it does not arrange pieces for you.

Use the drawing view that answers your question

• Front view: overall width, height and shelf arrangement.
• Side view: overall depth and the selected back.
• Exploded assembly: which panel goes where. The gaps are explanatory, not assembly clearances.
• One-part outline: the selected piece’s flat face.
• Hole and groove sheets: the actual machining locations, diameters and depths for compatible case settings.

The preview automatically changes scale to fit the screen. Increasing height can make the object look narrower on screen even while its width stays unchanged. Read the labels and the PDF dimensions rather than judging size from pixels.

Read drilling locations from the named edges

For a side panel, the PDF’s horizontal positions run from its front edge; vertical positions run from its bottom edge, looking at the inside face. Label those references on both sides before drilling. A dimension from the bottom of a part is not a distance from the last hole.

Panel-end holes are a separate setup. In our doweled case detail they are centered through the panel thickness, with positions across its front-to-back depth matching the side-face holes. Read both sheets: their drilling depths can be different. See the illustrated dowel-joint guide.

Groove width and groove depth are different

For a recessed fixed shelf, groove width receives the shelf thickness; groove depth enters the side face. Shelf length includes engagement in both sides. Read the dado shelf-length example and follow the generated groove schedule. Our current grooves run through from front to back.

Use one unit system and understand rounding

Plan Studio converts the same physical design between inches and millimeters. Hardware fields explicitly marked mm remain millimeter inputs. Do not read an 8 mm pin as 8 inches, or assume a nearby imperial size is identical.

Fraction labels are rounded to the nearest 1/32 inch when that option is selected. Exact decimal dimensions in a construction PDF govern the cut and drilling layout. A displayed fraction is not a machining tolerance. Confirm the fit with your actual material and hardware.

Print scale: when does 100% matter?

Ordinary construction drawings may show a reduced scale. Use their written dimensions; do not enlarge them and treat them as templates. Full-size tiled templates are specifically labeled 1:1. Print those at 100% / Actual size, without Fit to page, and measure the 50 mm calibration ruler before transferring marks. Assemble tiles using their registration marks and intended overlap.

If your printer cannot reproduce the calibration length accurately, use the written coordinates to lay out the work instead. A correct-looking screen preview does not verify a physical print.

What the plan does and does not confirm

A matched machining layout checks the geometric conditions implemented in Plan Studio. It is not a load rating, material test or complete installation design. Read the connection warnings, actual hardware instructions, back-fastener requirements and wall-restraint needs. Desktop plans do not include a base.

Changing individual piece sizes or counts does not reshape the overall assembly views. The app blocks matched case PDFs when those edits invalidate the generated geometry. Return to overall sizes to regenerate a coherent layout, or resolve a custom construction separately.

Before you cut

• Project name, template, units and dimensions match your intention.
• Measured thickness and the exact panel product are recorded.
• Each part’s count, finished dimensions and orientation are clear.
• The planned cuts account for usable stock, grain and saw-cut width.
• Joint details and warnings have been read, and a scrap test fits.
• Any physical template passes its calibration check.
• Back fasteners, the base where needed, and restraint/installation are resolved.

Choose a starting layout, open Plan Studio, or save your build before taking the plan to the workshop.