A panel cutting calculator answers a simple question: for this cut list, how many boards do I need to buy? There are two ways to estimate it. The first, by area plus a safety margin, takes two minutes with a pen or in Excel. The second uses a calculated cutting plan, where you actually see where every part goes. Below we take them one at a time, with an example using real numbers.
The data you need for an estimate
Whether you calculate by hand or with software, the input data is the same. The more accurate it is, the closer your quote is to reality.
| Input | Typical value | Why it matters |
|---|---|---|
| Board size | 2800 × 2070 mm, 18 mm thick (common for chipboard) | The basis of the calculation; check the format with your supplier, it varies between manufacturers. |
| Cut list | Name, length, width, pieces | No estimate without it; start from the design or the furniture recipe. |
| Saw kerf | About 3–4.5 mm | Lost on every cut. |
| Board trimming | About 10–15 mm per side | Reduces the usable area of the raw board. |
| Grain | Fixed or free, for each part | Parts with fixed grain cannot be rotated, so they are harder to lay out. |
| Edge banding | ABS / PVC, 0.4–2 mm | Changes the cut size and goes into the quote separately. |
For kerf and trimming, the details are in the article saw kerf and board trimming, and for grain in chipboard grain direction when cutting.
The quick method: area plus a margin
The simplest estimate is based on area. For each material separately:
- 1Calculate the net area
For each part: length × width × pieces. Add everything up, in m².
- 2Add the reserve
Multiply the net area by a factor for the saw kerf, trimming and gaps where nothing else fits. OptimCut recommends 30% (a factor of 1.3).
- 3Divide by the board area
A 2800 × 2070 mm board has 5.796 m². Round the result up: you do not buy half a board.
The method is fine for an indicative price. More about the area calculation and the margin in how many chipboard sheets you need.
Worked example: a simple wardrobe
Wardrobe 1200 × 2400 × 580 mm, 18 mm chipboard
Parts (cut sizes): 2 side panels 2400 × 580 mm, 2 top / bottom panels 1164 × 580 mm, 5 shelves 1164 × 560 mm. The HDF back is calculated separately, on another material.
Net area: side panels 2 × 2.400 × 0.580 = 2.784 m²; top / bottom 2 × 1.164 × 0.580 = 1.350 m²; shelves 5 × 1.164 × 0.560 = 3.259 m². Total 7.39 m².
Without margin: 7.39 / 5.796 = 1.28 boards. With a 30% margin: 7.39 × 1.3 = 9.61 m², so 9.61 / 5.796 = 1.66, rounded up to 2 boards.
Check on a plan: a board trimmed 10 mm per side has 2780 × 2050 mm usable. The first board takes the 2 side panels (along the length) and 2 shelves side by side on the remaining strip (2 × 1164 + 4 = 2332 mm). The second takes the other 3 shelves plus the top and bottom, two by two, in three rows (580 + 560 + 560 plus the cuts = 1708 mm out of 2050). So 2 boards are enough, with free space left on the second.
Edge banding on the front edge (2 mm): 2 × 2400 + 2 × 1164 + 5 × 1164 = 12 948 mm. With an extra 20 mm at the end of each banded edge (9 edges), that comes to about 13.1 m of edge banding.
In the quote: if, for example, a board costs you 60 EUR, the chipboard for the wardrobe comes to 120 EUR, plus the HDF, edge banding, hardware and labour.
The edge banding calculation above is simplified. For the complete rules (which edges get banding, how to subtract the thickness from the size, how much extra to allow) see calculating edge banding for furniture.
The limits of a quick estimate
The area calculation assumes the parts fit together like a perfect puzzle. Reality has a few traps:
- The area is enough, the geometry is not. A 2400 mm part and a 1200 mm part do not combine just any way; the strips left over may be too narrow for the next part.
- Fixed grain reduces the number of possible combinations. On a woodgrain decor with many fronts, the real margin can turn out higher than on plain white chipboard.
- Large parts (wardrobe side panels, tops) leave long, narrow offcuts. They may be reusable, but on the first order you pay for them in full.
- Several materials mean separate calculations: each decor is rounded up to whole boards.
For a large order, such as a complete kitchen, it is worth going straight to a full optimization. You will find a worked example in the cutting plan for a chipboard kitchen, and where the lost material goes in chipboard cutting waste.
How OptimCut's Quick optimization does it
Quick optimization is a trial calculation, separate from your company data: it does not use the stock, the material catalogue or the furniture recipes. In practice it works as a panel cutting calculator that gives you the cutting plan directly, not just a number.
- 1Open the module
On the home page press Quick optimization, then Continue.
- 2Enter the boards
Length, width and how many you have. No material is needed.
- 3Enter the parts
Name, length, width and pieces for each part.
- 4Optimize and print
Start the optimization and look at the diagrams. From the result you open the complete sheet, the diagrams, the cutting sheet and the labels, for printing or PDF.
A plan, not just a number
See which board each part lands on and how much space is left free.
No preparation
You do not have to fill in the catalogue or the stock first.
In the browser
Works on a computer, tablet or phone, so also at the customer's.
- The result is not saved under Optimization results: it disappears when you leave the page. If you want to keep it, download the PDF.
- It counts towards your plan's optimizations, like any other optimization.
- When the customer confirms the order, move it to the full workflow, with stock, recipes, trimming and edge banding, so the plan is exactly the one you cut from.
If the furniture is already described as a recipe, you do not need a separate estimate: in a normal optimization, the Material requirement step shows the net area for each material and the recommended value with a 30% margin. Details in the user manual.
Conclusion
For a quick quote, the area calculation with a 30% margin is a sound starting point. When the result is borderline or the order is large, check it on a real cutting plan. A one-board difference only shows up there.
The OptimCut Trial account is free, with 3 optimizations per month and up to 100 parts per optimization. Create a free account and try Quick optimization on your next quote. For larger volumes, see the Pro plan.
Frequently asked questions
How do I calculate how many chipboard sheets I need for a wardrobe?
Add up the area of all parts in the same material, multiply it by 1.3 for kerf, trimming and offcuts, then divide by the board area (5.796 m² for 2800 × 2070 mm) and round up. If the result is borderline, check it on a cutting plan.
Is there a free chipboard cutting calculator?
Yes. With the OptimCut Trial account, free and with no card, you get 3 optimizations per month, and Quick optimization gives you the cutting plan from just the board and part sizes.
How much margin should I add when estimating chipboard sheets?
OptimCut recommends 30% over the net area, for the saw kerf, trimming and gaps where no part fits. For orders with many fixed-grain parts or very large parts, check on a plan, because the real waste can differ.
Does Quick optimization change my board stock?
No. Quick optimization neither uses nor changes the stock, the catalogue or the recipes, and the result is not saved. It does count towards your plan's optimizations.
Try version 3.0.0
The Trial account is free: create your first cutting plans in minutes, right from your browser.