Packaging engineering calculators

Each calculator shows its formula next to its answer. They run in your browser; nothing you type is sent anywhere.

Calculators

Tool	What it answers
Spec Builder	From product to full box spec: style, flute, grade, dimensions, dim weight and pallet pattern in one sheet.
Dimensional weight calculator	Enter a box's outside size and actual weight to see what USPS and FedEx bill it at, and the smallest cut that saves a pound.
McKee box compression calculator	Estimate the top-to-bottom compression strength of a regular slotted box from its board ECT, caliper and size, or work out the ECT a target strength needs.
Stacking strength and safety factor calculator	Work out the compression strength a box needs for a stack, after losses for storage time, humidity, stacking pattern and overhang.
Pallet pattern and cube calculator	Find how many cases fit per layer on a pallet, how many layers fit under a height limit, and how much of the load space the cases fill.
Box blank size calculator	Get the flat blank size and board area for any slotted style from its inside dimensions and flute.
Inside ↔ outside dimensions calculator	Convert a box's inside dimensions to an estimated outside size, or back, for any flute.
Box volume and cubic feet calculator	Turn box dimensions in inches or millimetres into cubic inches, cubic feet, litres and US gallons.
Freight density calculator	Compute shipment density in pounds per cubic foot from its outside dimensions and weight, for one piece or a pallet load.
Void and air ratio calculator	See how much of a box is empty space around the product, and how much smaller the box could be.
Units per gaylord calculator	Count how many cases or parts of a given size fit inside a bulk bin.
Box weight from basis weight calculator	Estimate the weight of an empty corrugated box from its blank area and the combined weight of the board.
NMFC Item 222 checker(pending)	Check a box's grade, gross weight and size against NMFC Item 222. The limits are pending verification, so this tool does not give a pass or fail yet.
ECT ↔ Mullen lookup(pending)	Look up the burst grade that corresponds to an ECT grade under the freight classification tables. The table is pending verification.