Calculate package volume, CBM or cubic feet, dimensional weight, and estimated chargeable shipping weight from carton dimensions.
Calculate shipping dimensions and chargeable weight
Enter carton dimensions, quantity, actual weight, and the divisor from your carrier or freight quote. The calculator converts dimensions into volume and dimensional weight, then compares it with actual weight.
This is an estimate for planning and supplier communication. Your carrier, forwarder, marketplace, destination country, contract, and service level may use a different divisor, rounding rule, minimum weight, or surcharge.
What a shipping dimensions calculator is for
Shipping dimensions matter because carriers price bulky packages by space as well as weight. A carton that looks light on a scale can still be expensive if it takes up a lot of aircraft, truck, or warehouse space.
This tool is useful before you ask a supplier for a freight quote, compare packaging options, or decide whether a product should ship by courier, air freight, or sea freight.
Real-world use case
You are sourcing a product from China and the supplier gives a carton size of 50 x 40 x 30 cm with 10 kg actual weight. This calculator shows the CBM, dimensional weight, and estimated chargeable weight, so you can ask the freight forwarder a more specific question instead of sending only product weight.
Common mistakes
- Mixing CBM with kilograms. CBM is volume, while dimensional weight is a billing weight estimate.
- Using product size instead of packed carton size. Freight is usually based on the packed outer carton or package.
- Using 5000 for every shipment without checking the carrier divisor.
- Forgetting to multiply by the number of packages.
- Ignoring rounding rules and minimum billable weight.
When this tool is not enough
This calculator does not include fuel surcharge, remote area fee, oversized package fee, customs duty, insurance, warehouse handling, or destination delivery charges. Use it as a planning estimate, then confirm the divisor and billing rules with the carrier or freight forwarder.
Related shipping tools
Use these tools together when checking dimensions, weight, carton volume, and freight planning.
FAQ
What dimensions should I enter?
Use the packed carton or package dimensions, not only the product dimensions. Freight billing normally uses the outer package size.
Is dimensional weight the same as CBM?
No. CBM is cubic meters. Dimensional weight converts volume into a billing weight using a divisor such as 5000 for cm/kg estimates.
Can I use this for sea freight?
You can use the volume and CBM result for sea freight planning, but sea freight quotes may use CBM, weight, minimum charges, and lane-specific rules.
New guide: shipping weight and dimensional weight
If you are comparing courier, air freight, or sample shipping quotes, read the full guide before choosing a divisor or estimating chargeable weight.
More shipping weight articles
Use these practical articles when you need to understand why shipping weight, dimensional weight, carton dimensions, and chargeable weight affect the final quote.
Actual vs dimensional weightAsk supplier for carton dataCourier vs air freightFreight quote checklist