Parcel weight bench
Which of volume and mass is actually paying for the flight.
A light parcel can be billed as a heavy one. Until you divide the packed volume by the line’s divisor you cannot tell which figure the quote used.
Basis. Volumetric weight is the packed volume in cubic centimetres divided by the line divisor. The chargeable figure is the greater of volumetric and actual weight, then rounded up to the line’s billing step. Parameters last confirmed 2026-09-12.
Parcel weight bench
- Volumetric
- 2.483 kg
- ÷6000
- Actual
- 2.4 kg
- on the scale
- Chargeable
- 2.5 kg
- volume drives it
| # | Step | Value |
|---|---|---|
| 01 | Packed volume ÷ divisor | 2.483 kg |
| 02 | Actual weight on the scale | 2.4 kg |
| 03 | Greater of the two | 2.483 kg |
| 04 | Rounded to the billing step | 2.5 kg |
| ∑ | Chargeable weight used for the quote | 2.5 kg |
The gap between volumetric and actual weight is 0.083 kg (3.4%).
Volume and mass are within 5% — packing changes will not move the quote much.
Divider in use: 6000 (Air economy), last confirmed 2026-09-12. Re-check it against the quote you were actually given before acting on the number.
The divisor is the whole argument
Every line publishes a divisor, and the divisor decides how much a bulky parcel is punished. The same box billed at 5000 and at 8000 differs by more than a third, which is why the bench asks you to choose the divisor rather than assuming one.
| # | Mode | Divisor | Typical billing |
|---|---|---|---|
| 01 | Express air | 5000 | Per kilogram, billed on the greater of mass and volume |
| 02 | Air economy | 6000 | Per half kilogram on consolidated builds |
| 03 | Rail and truck | 7000 | Per kilogram with a minimum chargeable figure |
| 04 | Sea freight | 8000 | Volume often drives the quote rather than mass |
The rounding step is not a rounding error
A line that rounds up in half-kilogram steps can add most of a kilogram to a light parcel. The bench lets you switch the step so you can see how much of a quote comes from rounding rather than from the parcel itself.
- Measure the parcel sealed, not the goods loose.
- Measure the longest side last, after the tape has been applied.
- If the line rounds in half kilograms, test whether removing a box crosses a step boundary.
What packing actually changes
Only two packing changes reliably move the chargeable figure: removing rigid retail packaging and reducing void space. Requests that do not change the packed dimensions do not change the quote, however sensible they sound.
The bench prints the number of centimetres you would have to remove from the longest side to bring volumetric weight down to the actual weight, which turns a vague instruction into a measurable target.
Questions this gauge gets asked
| # | Question | Answer |
|---|---|---|
| 01 | Should I use centimetres or inches? | The bench takes centimetres because the divisor is defined in cubic centimetres. Convert inches once rather than converting the divisor. |
| 02 | Why is my quote higher than the bench predicts? | Check three things in order: the divisor the line actually used, the rounding step, and whether the parcel was re-measured after repacking. |
| 03 | Does the divisor change with destination? | It changes with the line and the mode, not with the destination. The same line to a different country uses the same divisor. |
These are written as ordinary headings and paragraphs rather than as marked-up questions, because marked-up questions no longer produce a richer result in search.
Entries this gauge pairs with
- How do you read a shipping quote line by line?
Read the header first, then the chargeable weight line, because it decides more of the total than anything else. After that come linehaul bands, surcharges, insurance and signature lines, and finally duty or tax, which is not postage. Ask for the basis of any line you cannot reconstruct yourself.
- How is chargeable weight calculated on a consolidated parcel?
Multiply the packed carton dimensions, divide by the line’s divisor, and compare that figure with the scale reading. The larger one is chargeable, then rounded up to the line’s step. Consolidation is where the two diverge, because the outer carton keeps its volume while the contents get lighter.
- How do you read a per-kilo quote without being surprised later?
Read four things: the divisor behind the weight, whether the rate is applied before or after half-kilo rounding, the minimum charge, and the fixed handling lines that sit outside the rate. Multiply after rounding, not before. A quote that omits the divisor and the step cannot be compared with another line.
Other gauges on the bench
- Landed-cost ladder
Three ways to move the same parcel, priced side by side.
- Border cost bench
Duty and tax assessed on the landed value, as a band.
- Slip cross-check bench
Compare what the slip claims against what you measured.
- Transit window bench
Reported arrival windows with the sample count attached.