Observed arrival · 2026-08-26
RollSpec, the roll-material calculator for packaging engineers
A specialized workbench for calculating roll length, outer diameter, weight, GSM, material yield, surface area, and shipping volume.
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Field notes
The workbench models flexible-web rolls from substrate density, micron thickness, web width, core geometry, target length, and winding tightness. Its preset library covers materials from BOPP and BOPET to aluminum foil, kraft paper, nylon, and thermal ribbon, while the displayed example derives a 400.7 mm roll diameter, 135.75 kg net film weight, and 7,500 m² of surface area. A separate converter translates caliper into GSM and area yield.
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
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