Why we built it
Dimensional-weight rules are easy to misunderstand because the result depends on package volume, a service-specific divisor, actual weight, and rounding. DimWeight Lab puts those inputs in one transparent comparison and keeps the math visible.
How we work
The calculator runs locally in your browser. We publish the formula, show common profiles only as planning references, and provide a custom divisor so you can model the value in your own current agreement. Calculator inputs are not intentionally stored by DimWeight Lab.
Editorial standard
Our guides explain stable shipping concepts with worked examples. We do not present carrier prices or rules as live data. When a decision depends on a current tariff, service guide, route, or account contract, we tell readers to verify that source directly.
New educational pages are checked for a clear purpose, internally consistent arithmetic, plain-language definitions, working links and an appropriate reminder to verify time-sensitive rules. Review dates appear on major guides so readers can judge freshness.
What the tool does not do
DimWeight Lab does not sell postage, connect to private carrier accounts, guarantee invoice totals or determine whether a package will be accepted. Dimensional weight is one input among route, service, size thresholds, surcharges and negotiated pricing. The calculator is designed for planning and comparison before a user checks a current quote.
Advertising and independence
Advertising may help fund the free site. Advertisers do not choose calculator results or editorial conclusions. We do not insert manual ad units into calculator controls. Support, legal and navigation-only pages do not load the AdSense ad script. Sponsored or affiliate relationships, if introduced, will be disclosed where they appear.
Corrections and accessibility
If you find a calculation, explanation, link or accessibility problem, send the page URL, a non-confidential example and the result you expected. We review useful corrections and update the relevant page when warranted.
Publisher
DimWeight Lab is published by Target Digital. Questions, corrections, and accessibility feedback are welcome at support@targetdigita.com.
Last reviewed: October 29, 2026.