International carriers must account for both mass and the space a parcel occupies. For many routes, the chargeable weight is the greater of actual weight and volumetric weight. This is why a product-only estimate can differ from the amount shown after warehouse packing.
The two measurements
Actual weight
The measured physical weight of the packed parcel, including the product, boxes and protective materials.
Volumetric weight
A calculated value based on parcel length, width and height using the divisor specified by the selected route.
Why the final amount may change
- The seller may provide an approximate product weight before the warehouse receives it.
- Protective packaging, shoe boxes and outer cartons increase weight and dimensions.
- Different routes can use different volumetric formulas, minimum increments or size limits.
- Restricted products may have fewer eligible routes, changing the available price range.
- The final packed parcel provides more reliable measurements than an early estimate.
How to plan more accurately
Use the shipping estimator for comparison, not as a guaranteed quotation. Check whether the route charges by actual or volumetric weight, consider whether original packaging is essential, and compare the estimated result with the final parcel details before payment. Rehearsal or pre-packing services, when offered, can provide better dimensions before route selection.
Read our shipping guide for more planning steps and use the invitation-linked SUGARGOO shipping estimator for current route information.
Frequently asked questions
Which weight is used for shipping?
It depends on the route. Many carriers charge the greater of actual weight and calculated volumetric weight.
Why can a light product have expensive shipping?
A bulky parcel occupies more transport capacity and may be billed by volumetric weight.
Is an online shipping estimate final?
No. The final packed size, weight, route availability and selected services determine the amount shown at parcel submission.