Couriers charge by size as well as weight, so a light but bulky parcel can cost more than you expect. Enter the item size, the packing you will add and the packed weight to see the volumetric weight and the weight you will be charged for.
Shipping volumetric weight
How it works
Volumetric weight (kg) = length × width × height in cm ÷ the courier’s divisor. Many express couriers use 5000, but some use other figures, so check yours. Inches are converted to centimetres first.
The chargeable weight is the higher of the volumetric weight and the actual weight, usually rounded up to the courier’s weight step.
Worked example
A 40 × 30 × 20 cm wooden toy set with 5 cm of packing on each side ships in a 50 × 40 × 30 cm box. With a divisor of 5000, its volumetric weight is 12 kg. If the packed box weighs 3 kg, you will be charged for 12 kg.
Good to know
- Fragile art needs good packing, which adds size. Snug, well-fitted packing keeps the volumetric weight down without risking damage.
- Couriers may round the box dimensions too, and some apply minimum charges or surcharges for large items. Their own quote is final.
- Shipping antiques across borders can need permits. Check the export and import rules before you sell or buy.
Frequently asked questions
What is volumetric weight?
It is a weight calculated from a parcel’s size. Couriers use it so that large, light parcels pay for the space they take up.
Which divisor should I use?
Ask your courier. Many express services use 5000 for centimetres and kilograms, but others use 4000, 6000 or their own figure.
How can I reduce shipping costs for art?
Use the smallest box that still gives safe padding, and choose packing that protects the piece without adding much bulk.
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