WIN-J · EVERYDAY & WORK TOOLS
Lumber and linear stock cutting planner
Plan linear stock cuts with blade kerf and end allowances. View numbered layouts, offcuts and a detailed cutting list, then save a CSV or print the plan.
Results
This suggested plan compares several orders and packing rules; it does not guarantee a global optimum or minimum purchase quantity. A full blade width is reserved to separate an offcut. Only a part that exactly fills the remaining usable length needs no final cut.
Cut layout by stock item
Numbers match placement order in the cutting list. Grey is end allowance, red is saw loss, and hatching is the offcut. Very short regions are not enlarged.
How to use
- Choose the length unit and enter the stock length, saw kerf and allowance for each end.
- Add each part name, length and required quantity.
- Create the plan and check the layouts and offcuts for each stock item.
- Save the CSV or choose PDF in the print dialog to keep a cutting list.
Example
With 2,400mm stock, a 3mm kerf and 10mm at each end, two each of 900mm, 600mm and 300mm require 2 stock items. Finished parts total 3,600mm. Saw loss is 18mm, end allowances 40mm and offcuts 1,142mm, adding up to the full 4,800mm.
Method and limitations
All stock items have the same length and cross-section. Lengths use integer 0.001mm ticks; usable length is L−2t. Each separated part reserves a full kerf k, except when it exactly fills the remaining usable length and no final cut is needed. A non-exact fit leaving less than a full kerf is rejected by this conservative model. End allowance t already includes that trimming operation's saw loss. Six deterministic candidates combine descending, ascending and input order with first-fit and best-fit packing. The fewest stock items wins; ties prefer the longest remaining offcut. This does not prove a minimum or global optimum. The limits are 1–50 rows, 1–200 total parts and 1,000,000mm per length. The non-part ratio includes offcuts, kerf and end allowances together. Two-dimensional sheets, cutting angles, width, thickness, knots, cracks, grain, real saw tolerances and safe operating procedures are outside the calculation.
Frequently asked questions
Can it lay out plywood in two dimensions?
This is a one-dimensional tool for cutting lumber, bars and similar stock along its length. Calculate different widths or thicknesses separately.
Do I add kerf again to the end allowance?
No. Include the trimming cut's saw loss in the allowance for each end. The tool applies that allowance twice and adds only the separate part-cutting kerfs.
Does it use the fewest possible stock items?
It compares six deterministic candidate layouts. It does not guarantee the mathematical optimum or minimum purchase quantity; another arrangement may be better.
Are my inputs saved?
Calculation stays in the current browser memory. Save the CSV or result text before reloading. You can also print to PDF.