About the Dimensional Weight Calculator
Estimate a parcel's volumetric weight so you can compare it with its actual weight before shipping.
Formula or method
Dimensional weight = length × width × height ÷ carrier divisor. Estimated billable weight = the greater of dimensional weight and actual weight.
Worked example
A 10 × 10 × 10 cm parcel has 1,000 cm³ of volume. With a divisor of 5,000, dimensional weight is 0.2 kg. At an actual weight of 1 kg, estimated billable weight is 1 kg.
How to use the tool
Start with the example values above, then replace each input with your own figures. The results update immediately. Review the units, denominators, and assumptions before using any number in an important decision.
Assumptions and limitations
Carrier divisors and rounding rules vary by service and destination. This tool uses your entered divisor; it does not calculate a live shipping tariff or oversize charge.
Frequently asked questions
Can a lightweight package cost more to ship?
Yes. A large but light package may be charged on the space it occupies rather than just its scale weight.
Privacy and support
Your inputs are processed locally in your browser. ToolMosaic does not upload or store the values you enter in this tool. Our tools are free, and we appreciate your support.