Terms of use

Using the calculators

Free to use, for personal or commercial purposes, without an account and without attribution. You do not need our permission to use a result in a quote, a spreadsheet or a business plan.

Estimates, not advice

Everything here is a planning estimate produced from published rules. It is not legal, tax, customs or financial advice, and it is not a quotation. The accuracy and disclaimer page covers what each type of number can and cannot support.

What you may not do

• Scrape the site at a rate that degrades it for other people.
• Republish the calculators as your own product.
• Present our estimates as authoritative rates from a carrier, marketplace or customs authority.

You are welcome to link to any page, quote a figure with attribution, or embed a calculator using the official embed.

Availability

This is a static site served from a global edge network, so it is about as reliable as the web gets — but we make no uptime commitment and may change, move or retire any calculator. Where a page is retired we redirect it rather than breaking the link.

Liability

The site is provided as it is, without warranties of any kind. To the extent permitted by law we accept no liability for loss arising from use of these calculators. Verify anything that matters against the primary source, which we link on every page.

Trademarks

Third-party names are used descriptively to refer to those companies' published rules. The disclaimer carries the full statement.

Changes

If these terms change materially we will say so on this page with the date. Continued use after that constitutes acceptance.