Shipping & Logistics

Dimensional Weight Calculator

Carriers charge for the size of a box, not just its weight. Find the dimensional (DIM) weight and the billable weight you’ll actually pay for.

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Your numbers

Divisors can differ by service and account — check your rates

in
in
in
lb

Results

Billable weight

9 lb

You’ll be charged by size (DIM weight) — a smaller box could save money.

Box volume
1,120 in³
Dimensional weight
8.06 lb
Actual weight
4 lb
Billable weight (rounded up)
9 lb

Download your results

Branded KleverKlimb report with your inputs and results.

How it works

The formula

Exactly what this calculator does with your numbers — no hidden assumptions.

01deployed_code

DIM weight

DIM weight = length × width × height (inches) ÷ divisor. UPS and FedEx commonly use 139; USPS uses 166.

02scale

Billable weight

Carriers charge for whichever is greater — actual or DIM weight — rounded up to the next whole pound.

03package_2

USPS exception

USPS applies dimensional pricing only to packages larger than one cubic foot (1,728 cubic inches).

Dimensional Weight Explained: Why Your Shipping Costs More Than It Should

4-minute guide · How UPS, FedEx and USPS calculate dimensional weight, the divisors they use, and practical ways to cut your billable weight.

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FAQ

Questions, answered

Q1How do I lower my dimensional weight?
Use the smallest box that protects the product, cut down oversized boxes, or switch to poly mailers for soft goods. Every inch removed from each side reduces the volume a lot.
Q2Should I round my measurements?
Carriers generally round each dimension to the nearest whole inch and the billable weight up to the next pound. Measure the longest point of each side, including bulges.
Q3Does DIM weight apply internationally?
Yes, usually with metric units (cm and kg) and divisors such as 5,000 or 6,000. Use the custom divisor that matches your carrier and service.

Estimates only. Carriers set their own divisors, rounding rules and size surcharges, which can vary by service and contract.

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