StowHand — Freight calculators that show their working

Field notes

The calculators are organized around practical failure points in freight work: a pallet may fit the container but not its door, a non-stackable load can change how volume is billed, and a strap’s label value is not the same as its restraining effect. The site says each tool prints its arithmetic and names the governing rule, including EN 12195-1, NMFC freight classes, European axle limits, and the US federal bridge formula. Figures are explicitly framed as planning estimates rather than invoice authority.