Grid is deliberate
Across, down and layers describe how you intend to pack the product. The tool does not rotate, compress or nest irregular products invisibly.
PACKAGING & SHIPPING
Model the handoff
after finishing.
Turn finished-piece dimensions and a deliberate carton grid into carton counts, outer dimensions, gross mass and volumetric shipping weight. No carrier rates are invented; the tool exposes the assumptions you provide.
✓ Browser-local✓ Assumptions visible✓ Exportable record
Describe one packed unit
Cartons, mass and chargeable weight
Cartons–rounded up
Units / carton–packing grid
Gross weight–all cartons
Chargeable–actual vs volumetric
MODEL
Build a carton estimate.
Chargeable weight uses the larger of modeled gross mass and volumetric mass.
Packaging is a physical model, not a carrier quote.
Dimensional weight varies
Carriers use different divisors, rounding and service rules. Enter the divisor supplied for the service you are evaluating and treat the result as planning evidence only.
Protective material matters
Padding and extra carton allowance expand the modeled outer dimensions. Add real inserts, tubes, corner protectors or pallets separately when they change the shipping unit.