Measure the packed box
Measure the longest outside length, width and height after adding tape, padding and any protective packaging.
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Dimensional Weight Calculator
Enter your package dimensions and actual weight to calculate dimensional weight and estimate the billable weight before comparing international shipping quotes.
Calculate shipping weightSTEP 01
Enter package details
Measure the outside of the fully packed box.
cm
cm
cm
kg
Use the value specified by your carrier or contract.
STEP 02
Calculation result
Enter package details to see the result
Complete the length, width, height and actual weight fields.
HOW TO CALCULATE DIM WEIGHT
A practical guide for online sellers
Shipping cost can depend on both scale weight and the amount of space a packed box occupies in a vehicle or aircraft.
Check the carrier divisor
A divisor of 5000 is common for metric calculations, but some services use 6000 or a contract-specific value.
Compare both weights
Compare the calculated dimensional weight with the actual scale weight. The higher value is commonly used as billable weight.
EXAMPLE
What about a 40 × 30 × 25cm box?
Assume the package weighs 3kg and the carrier uses a DIM divisor of 5000.
40 × 30 × 25 ÷ 5000
Dimensional weight: 6kgBecause 6kg is higher than the actual 3kg, the estimated billable weight is 6kg.REDUCE SHIPPING COSTS
Four ways to reduce dimensional weight
Avoid using one oversized carton for every order. Choose the smallest box that still protects the product.
Use appropriate padding and remove unnecessary void space without compromising product safety.
Changing item orientation can reduce one side of the carton and lower the total cubic volume.
Record the final packed dimensions and weight whenever packaging changes to reduce billing surprises.
FAQ
Dimensional weight questions
What is dimensional weight?
Dimensional weight, also called volumetric weight, converts the space a package occupies into an equivalent weight for shipping calculations.
Do carriers use actual weight or dimensional weight?
Many carriers compare both values and use the higher one as billable weight. The final method and rounding increment depend on the carrier and service.
Is the DIM divisor always 5000?
No. Divisors vary by carrier, service, route and contract. Common metric values include 5000 and 6000, so confirm the current terms for your shipment.
How should I measure package dimensions?
Measure the longest outside length, width and height after the package is completely sealed. Include any bulges or protruding parts.
Does this calculator show the final shipping price?
No. It estimates billable weight. The final price also depends on the rate card, fuel surcharge, destination fees, customs services and other charges.
What is the easiest way to lower dimensional weight?
Use a box that closely fits the product and reduce unnecessary empty space while keeping enough protection for safe transit.
Method and limitations
This tool divides package volume by the selected DIM divisor, then compares dimensional weight with actual weight. It is an estimate for quote comparison; carrier measurements, rounding rules, billing increments and surcharges take precedence.
Content reviewed: August 11, 2026