What it does
Box Fit & Dimensional Weight Worksheet is a free tool. Enter box dimensions, item dimensions and weights, and it checks fit and computes billable weight under the published USPS dimensional-weight rule.
Everything runs in your browser. Your entries are not uploaded anywhere.
Method and sources
The rule and its Federal Register source are cited at the bottom of the main page.
Who runs it
An independent project. It is not affiliated with the companies or agencies named on the site, and it is free to use.
Accessibility
We aim for this site to be usable with assistive technology (screen readers, keyboard navigation, zoom), in line with WCAG 2.2 AA. If something is hard to use, email us and we will fix it.
Contact
Questions or corrections: atzmonpersonalassistant@gmail.com.