Glass · Production · Windows
Glass cutting optimiser for the windows of a job
What it does and how it is worked out
Lay out the panes of every window of a job on the sheet, free and in your browser. The list below is an example, four panes of 1000 × 1200, six of 600 × 1200 and four of 800 × 500 mm, so you see a result straight away: 2 DLF sheets of 3210 × 2250 and 74.2 % yield. Clear it and put in your own sizes.
Free, no sign-up, no email. Everything you type stays in this browser — your cutting list never reaches us.
A building job is one list for every window: put each pane in with its quantity and the page tells you how many sheets the whole job takes, before the order goes in.
- sheets
- —
- used
- —%
- waste
- —%
The plan is the shop-floor version of this: every piece labelled on the diagram, the cuts in the order the table makes them, and each offcut with its real size for the rack. It stays in your browser like everything else here.
Working out the cut is free and stays free. Pro holds 400 offcuts on the rack instead of 25, prints a label for every pane and keeps your saved jobs, for €29 once. What Pro adds →
What the software does in a glass shop
More than the nesting. What a workshop needs around a cutting list is here too, and none of it leaves this browser:
- Each pane carries its own data. A reference, a shape (rectangle, circle or triangle) and the glass it is cut from; a list pasted from a spreadsheet keeps them, and the plan groups the panes by glass.
- A rack of offcuts that knows where they are. Each offcut can have its place in the shop and a photo, and the next job is cut from the rack first.
- The plan and the labels for the table. The cutting plan can carry your logo, and every pane can get a label with a QR code.
- A log of what was cut. Today's jobs stay listed, to print the plan or the labels again.
To see it on a real order, open the example job. With Pro the rack holds 400 offcuts instead of 25 and every pane gets a label.
The example of this page, worked out
The list the page opens with is an example of the panes of every window of a job, not a customer's order: 4 × 1000 × 1200, 6 × 600 × 1200, 4 × 800 × 500 mm (quantity × width × height), on DLF sheets of 3210 × 2250 mm with 10 mm edge trim a side and 4 mm breakout, panes allowed to turn. The figures are the optimiser's own, worked out by the same code as the tool above.
| What the optimiser answers | Figure |
|---|---|
| Sheets to buy | 2 |
| Panes | 14 |
| Yield | 74.2 % |
| Offcuts back on the rack (7) | 3.36 m² |
| Scrap | 0.37 m² (2.5 %) |
What to watch with windows
- Double glazing counts twice. In a double-glazed unit each pane is in the list twice, once for each face of the unit (three times in triple glazing), unless the faces are different glasses: then each goes in the list of its own glass.
- The pane, not the frame. The deduction from the size of the frame to the size of the pane comes from the frame system's maker: the optimiser nests the pane sizes it is given.
- Your sheet, your table. Change the sheet to the one you buy and the trim and breakout to your cutting table's: the plan is worked out again as you type.
Workshop templates for windows
Example sizes, not a standard: load one into the list above, then change each size to the opening you measured. Loading one replaces the list; nothing is sent and no email is asked for.
| Template | Qty × width × height, mm | Sheets | Yield | |
|---|---|---|---|---|
| Six two-leaf windows, double glazed (two panes a unit) | 24 × 520 × 1020 | 2 | 88.1 % | Load |
| A flat: four balcony-door leaves and four window leaves, double glazed | 8 × 620 × 1820, 8 × 520 × 1020 | 3 | 61.2 % | Load |
| Fanlights and fixed lights | 4 × 1500 × 400, 4 × 900 × 900 | 1 | 78.1 % | Load |
Sheets and yield on a DLF sheet of 3210 × 2250 with an empty rack, as the optimiser works them out. Every job worked through in full: three orders worked out.
Questions people ask
- How many glass sheets does this window job take?
- The example on this page, 4 × 1000 × 1200, 6 × 600 × 1200, 4 × 800 × 500 mm (quantity × width × height), fits on 2 DLF sheets of 3210 × 2250 mm with 10 mm edge trim and 4 mm breakout, at 74.2 % yield, and 7 offcuts go back on the rack. Put in your own sizes and the page works out yours.
- Does the optimiser work out the glazing deduction of a window frame?
- No. It nests the pane sizes it is given; the deduction from the frame's size to the pane's comes from the frame system's maker.