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.

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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.

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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.