Selling / Shipping
Dimensional Weight Calculator (Volumetric and Billable Weight)
Work out a parcel's dimensional or volumetric weight from its length, width, and height with the divisor your carrier uses, compare it with the actual weight, and see the billable weight, in centimetres and kilograms or inches and pounds.
Dimensional Weight Calculator (Volumetric and Billable Weight): Dimensional weight is length × width × height ÷ the divisor. A 60 × 40 × 40 cm box is 96,000 cm³, and with a divisor of 5000 it counts as 19.2 kg; if it weighs 12 kg, you are billed for 19.2 kg, or 20 kg rounded up. In inches, a 24 × 16 × 16 box with a divisor of 139 counts as 44.2 lb. Runs 100% locally in your browser with zero server file uploads.
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Carriers charge for the space a parcel takes as well as its weight: the dimensional or volumetric weight is length × width × height ÷ a divisor, and you pay for whichever is higher. A lower divisor makes the dimensional weight higher. Divisors differ by carrier, service, and country, and can change, so check the one in your carrier's current rates; measure each side at its longest point and round up as your carrier does.
Divisors and units
Metric divisors are in cubic centimetres per kilogram, such as 5000 or 6000; imperial divisors are in cubic inches per pound, such as 139 or 166. A divisor of 5000 cm³/kg is about 138 in³/lb.
Measuring
Measure the longest point of each side, including bulges, and round up to the next whole centimetre or inch, since carriers measure the same way.
How to use it
- Choose metric or imperial units and enter the parcel's dimensions.
- Enter the actual weight and your carrier's divisor.
- Read the dimensional and billable weight.
Privacy & limitations
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Frequently asked questions
Why do carriers charge by size?
A large, light parcel takes up as much space in a van or plane as a heavy one, so carriers bill whichever is greater, the actual or the dimensional weight.
Which divisor should I use?
The one in your carrier's current rate guide for the service you use: divisors differ between carriers, between domestic and international services, and sometimes by account.
How can I lower the dimensional weight?
Use the smallest box that protects the item: cutting a few centimetres off each side reduces the volume a lot, because the three sides multiply.
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