Dieline Calculator

This calculator unfolds a standard RSC (Regular Slotted Container) box into its flat die-cut pattern. The flat width comes from twice the sum of length and width — the four side panels laid out edge to edge — plus a fixed 1.25-inch manufacturing joint (the glue flap that closes the box into a tube). The flat height is the box height plus two flap depths, where each flap depth defaults to half the box width, matching the standard RSC convention of flaps that meet in the middle at both the top and bottom. Bleed is then added on all sides for print and trim margin, and the two flat dimensions multiply out to a total sheet area, which the calculator also expresses in square feet and compares against the box's actual internal volume to produce a "volume efficiency" figure — how much usable cubic space you get per square inch of material, a useful lever for cutting material cost or shipping weight.

This models one specific, common box style (RSC with standard half-width flaps and a fixed glue flap) rather than every carton style — auto-bottom, tuck-top, or other structural styles fold differently and would need different flat-pattern formulas. The score-line count and total score length are simplified estimates of the fold geometry rather than a full structural design output, and the weight estimate assumes a rough linear relationship between material caliper and areal weight normalized to a ~4mm C-flute baseline, which won't hold precisely across very different board thicknesses or flute profiles. Use this to get a fast, reasonable flat-pattern size and material estimate early in the design process, then hand the actual production dieline off to structural design software for exact fold geometry, tooling, and artwork.