Box size, the board you run, today's paper rate. You get the cutting size, board weight, the kilos of each grade to purchase, and cost per box — with every step shown, so you can check it against your own sheet.
₹0.00 selling price / box
Cost ₹0 · margin ₹0 · order value ₹0
| Grade | Kg | ₹ |
|---|
Includes wastage, so this is what to buy — not what ends up inside the boxes.
Nothing typed here leaves your browser. The link carries the numbers in the address itself — open it anywhere and the same costing comes back.
A regular slotted container wraps once around the box. Along the running length there are four panels — length, breadth, length, breadth — plus the lap where the joint is stitched or glued. Across the deckle there is the height plus one full breadth, because the top and bottom flaps are each half the breadth.
Cutting length = 2 × (L + B) + joint and fold allowance
Deckle = B + H + flap fold allowance
The allowances are what nobody agrees on. A 5 ply BC board needs more fold allowance than a 3 ply E flute, and every corrugator has settled on a joint lap over years of running. Both figures are editable here rather than fixed, so the sheet size can be made to match what you actually cut.
The corrugating medium is fluted, so a metre of finished board holds more than a metre of that paper. The take-up factor accounts for it: roughly 1.36 for B flute, 1.45 for C, 1.55 for A, 1.27 for E. It applies to the fluting alone. The liners run flat and take up nothing. Applying the factor to the whole board — a common shortcut — overstates a 3 ply by around eight per cent, and the error grows as the flute gets bigger.
If eight per cent of board is lost to trim, set-up and rejection, then shipping one good box means buying the board for one box divided by 0.92 — not multiplied by 1.08. On ₹100 of board that is ₹108.70 rather than ₹108. Small on one box. Not small across a year.
The BS shown is an estimate from the GSM and BF of each paper. It is useful for comparing one board specification against another. It is not a substitute for a Mullen test — real bursting strength depends on gumming, moisture and how the board was run.
Your customer is almost always registered and claims the input credit, so GST changes what goes on the invoice but not whether your price is competitive. Keeping it out of the per-box figure means the number you compare against a rival quote is the right one. It is there at the bottom because that is the figure you type into the quotation.
Threxa is an ERP built for corrugated box plants in India. It holds your board specifications and paper rates, prices a quotation from them, turns that into a job card, and measures the wastage that actually happened against the figure you assumed here.
See how Threxa runs a plant