Why is my dimensional weight higher than the actual weight?

Carriers charge for the space a package takes up, not just its weight — a large, light box can cost more to ship than a small, heavy one. They bill whichever number is higher.

Which carrier divisor does this use?

139 for inches (giving pounds) and 5000 for centimeters (giving kilograms) — the standard divisors used by DHL, FedEx and UPS.

Does this tool upload my package details anywhere?

No — the calculation runs entirely in your browser.

Dimensional Weight Calculator

Calculate shipping dimensional (volumetric) weight from box dimensions and compare it to the actual weight.

Length

Width

Height

Unit

Actual weight (kg)

Dimensional weight

0.60

Billable weight

1.00

Carriers bill whichever is higher — dimensional weight or actual weight.

Related tools

How it works

1
Enter box dimensions and actual weight
Length, width, height (in or cm) and the scale weight.
2
Dimensional weight calculated instantly
Using standard carrier divisors (139 for inches, 5000 for cm).
3
Read the billable weight
The higher of dimensional and actual weight — what carriers actually bill.

FAQ

Why is my dimensional weight higher than the actual weight?: Carriers charge for the space a package takes up, not just its weight — a large, light box can cost more to ship than a small, heavy one. They bill whichever number is higher.
Which carrier divisor does this use?: 139 for inches (giving pounds) and 5000 for centimeters (giving kilograms) — the standard divisors used by DHL, FedEx and UPS.
Does this tool upload my package details anywhere?: No — the calculation runs entirely in your browser.