Spec the box before you buy it.

Packgent turns a product's size and weight into a box spec a box maker can quote: style, flute, ECT grade, strength estimate, outside size, dimensional weight and pallet count. Every number shows the formula behind it.

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45.25 blankL 12W 10H 85outerouterLinnerinnerWLWtab
Drawn by Packgent from the style's flap rule. Solid lines are cuts, dashed lines are scores. A 12 × 10 × 8 in RSC drawn to scale in C flute.

That box, worked out

The drawing above is a regular slotted container, 12 × 10 × 8 in inside, in 32 ECT C flute. Here is what Packgent computes for it.

Outside size (C flute)12.31 × 10.31 × 8.47 in
Blank size45.88 × 18.31 in, 5.83 ft²
McKee compression estimate, 32 ECT493 lbf
USPS billable weight at 3 lb actual3 lb
FedEx billable weight at 3 lb actual7 lb

Method: formulas and assumptions. Carrier rules: dimensional weight by carrier. Full sheet: 12 × 10 × 8 in box.

Reference

Box styles
FEFCO codes with a dieline drawn at a real size, flap rules and what each style is good for.
Flutes
A, B, C, E, F and double and triple wall: caliper, flutes per foot and what each costs you in space.
Board grades
ECT grades from 23 to 112 with McKee strength estimates at common sizes.
Box sizes
160 stock inside sizes, each with outside sizes, dimensional weight, pallet counts and blank size.
Carrier dim weight
USPS and FedEx divisors and rounding rules, linked to the carrier's own page.
Test standards
ISTA procedures and ASTM and TAPPI methods: what each one tests and when you need it.
Product fit
Which box sizes fit flat goods such as ISO A sheets, ANSI drawings and art prints.
Gaylords and bulk
Bulk bin sizes with volume, pallet footprint and how many cases they hold.
Comparisons
Flute against flute, grade against grade and style against style, side by side.
Guides
Right-sizing, stacking strength, unit loads and reading a box maker's certificate.
Glossary
Plain definitions of corrugated and shipping terms, each pointing to the tool that uses it.

Calculators

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