Dimensional Weight Calculator
Compute DIM weight from package dimensions and find your billable shipping weight — the greater of actual weight and DIM weight, rounded up — for UPS, FedEx, and DHL.
Calculate your billable weight
Your shipping weight
Compare carriers for this package
Same box, same actual weight — different divisor, different bill. This is why the divisor matters.
| Carrier | Divisor | DIM weight | Billable |
|---|
The DIM weight formula
DIM weight = (Length × Width × Height) ÷ DIM divisor
Then: billable weight = round UP(max(actual weight, DIM weight)) to the next whole pound or kilogram. The carrier always charges the greater of the two — a light, bulky box is billed on its size; a small, dense box is billed on its scale weight.
Common published divisors: UPS & FedEx 139 in³/lb (5000 cm³/kg), DHL Express 166 in³/lb (6000 cm³/kg). Carriers publish these in their rate guides; verify the current figure before quoting a customer.
Worked examples
What this tool does — and does not — do
This tool computes shipping billable weight from package dimensions and carrier DIM divisors (UPS 139, FedEx 139, DHL 166, metric 5000/6000). It answers: “will I be charged for the size or the scale weight of this box?”
It is not a mass-unit converter. To convert between kilograms, pounds, ounces, and grams — with no shipping logic involved — use our weight converter instead.
Frequently asked questions
Free tool by NRTechStudio