Die-cut carton tab layout calculator

Calculate flat-net bounding length and flat-net bounding width with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use flat-net bounding length and flat-net bounding width to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Tray inside base length (mm)
100
Tray inside base width (mm)
80
Wall height (mm)
30
User neutral-axis fold allowance per wall (mm)
1
Glue tab width (mm)
10
Flat-net bounding length (mm)
162
Flat-net bounding width (mm)
142
Base and wall rectangles JSON [ID,x,y,width,height] (mm)
[["base",31,31,100,80],["left",0,31,31,80],["right",131,31,31,80],["bottom",31,0,100,31],["top",31,111,100,31]]
Corner glue tabs JSON [ID,x,y,width,height] (mm)
[["LB",21,0,10,31],["RB",131,0,10,31],["LT",21,111,10,31],["RT",131,111,10,31]]

Try another scenario

Tray inside base length (mm)
100
Tray inside base width (mm)
80
Wall height (mm)
40
User neutral-axis fold allowance per wall (mm)
1
Glue tab width (mm)
10
Flat-net bounding length (mm)
182
Flat-net bounding width (mm)
162
Base and wall rectangles JSON [ID,x,y,width,height] (mm)
[["base",41,41,100,80],["left",0,41,41,80],["right",141,41,41,80],["bottom",41,0,100,41],["top",41,121,100,41]]
Corner glue tabs JSON [ID,x,y,width,height] (mm)
[["LB",31,0,10,41],["RB",141,0,10,41],["LT",31,121,10,41],["RT",141,121,10,41]]
Calculation method

Calculation method

Flat-net bounding length (mm)

L+2*(H+foldAllowance).

Flat-net bounding width (mm)

W+2*(H+foldAllowance).

Base and wall rectangles JSON [ID,x,y,width,height] (mm)

Place base at (h,h), four rectangular walls around it, h=height+foldAllowance.

Corner glue tabs JSON [ID,x,y,width,height] (mm)

Four tabs adjacent to two end walls, each tabWidth by h; tabWidth<=h so net stays in bounding rectangle.

Symbols and units
a
Tray inside base length (mm)
b
Tray inside base width (mm)
c
Wall height (mm)
d
User neutral-axis fold allowance per wall (mm)
e
Glue tab width (mm)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Supported style: open-top rectangular tray with four corner glue tabs. User fold allowance summarizes their stock-caliper/creasing convention; no universal caliper compensation. Exact mathematical net, no dieline manufacturing tolerance or structural claim. Supported limits: L,W,H>0; foldAllowance>=0; 0<tabWidth<=H+foldAllowance; a prototype is required for a physical carton.
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