FEFCO 0201
Regular slotted box: blank size formula and dieline
The ordinary shipping carton, also called an RSC or American case. One piece of board, a glued joint down one corner and four flaps top and bottom. All flaps are the same length, and the two outer flaps meet in the middle.
Blank size calculator
The formula
| Blank length | 2L + 2W + 4t + g |
|---|---|
| Blank height | H + W + 2t − s |
- L, W, H
- internal length, width and height
- t
- board caliper (3 mm for B-flute)
- g
- glue flap width: 35 mm on corrugated, 15 mm on carton by default
- s
- gap between the flaps where they meet: 3 mm on corrugated, 1 mm on carton by default
Around the box are four panels: L, W, L, W. Each panel is drawn one caliper wider than the inside size, because at every corner the board bends around half its thickness on each side. That gives 2(L + t) + 2(W + t), plus the glue flap g.
Up the blank is the wall, H + t, and a flap above and below it. Each flap is half the width of the box, (W + t)/2, minus half the gap s that keeps the outer flaps from colliding.
Adding it up: H + t + (W + t) − s = H + W + 2t − s.
Example. 300 × 200 × 150 mm inside on B-flute corrugated (t = 3, g = 35, s = 3): blank 1047 × 353 mm.
Per board
The same 300 × 200 × 150 mm inside on each board. Thicker board means a bigger blank for the same inside size.
| Board | t (mm) | g (mm) | s (mm) | Blank (mm) |
|---|---|---|---|---|
| F-flute | 0.8 | 35 | 3 | 1038.2 × 348.6 |
| E-flute | 1.5 | 35 | 3 | 1041 × 350 |
| B-flute | 3 | 35 | 3 | 1047 × 353 |
| C-flute | 4 | 35 | 3 | 1051 × 355 |
| EB double wall | 4.5 | 35 | 3 | 1053 × 356 |
| BC double wall | 7 | 35 | 3 | 1063 × 361 |
In the generator
Not to be confused with
- FEFCO 0200
- Half slotted box: flaps on the bottom only, open top.
- FEFCO 0202
- Overlap slotted box: the outer flaps overlap partly.
- FEFCO 0203
- Full overlap box: the outer flaps overlap over the full width.
Questions
- What is the blank size of a 300 × 200 × 150 mm RSC?
- On B-flute (3 mm) with a 35 mm glue flap and a 3 mm flap gap: 1047 × 353 mm. On E-flute (1.5 mm) the same box needs a smaller blank; the table on this page lists every board.
- Why is my hand calculation a few millimetres off?
- The usual hand formula, 2(L + W) + glue flap by W + H, leaves out the board thickness. Every fold eats half a caliper on each side, so on 3 mm board a box drawn without it comes out about 12 mm too short around.
- Is this the same as the formula my box maker uses?
- The structure is the same, but every plant has its own allowances for glue flap, flap gap and crease. This formula is measured from our generator. Ask your die maker for theirs and compare.