POSTKID

Terms of Service

Last updated: July 26, 2026

Welcome

These terms cover your use of PostKid (“we,” “our,” or “us”) at postkid.com, including our letter-writing calculators, guides, museum, and everything else on the site. By using PostKid you agree to these terms and to our Privacy Policy. If you don’t agree, please don’t use the site. We may update these terms, and continued use means you accept the current version.

What PostKid Is (and Isn’t)

PostKid is a free, ad-supported site that helps children, families, and classrooms learn to write and send real mail. The Postage Calculator, Mail Delivery Time Estimator, Envelope & Paper Size Matcher, Pen-Pal Time-Zone Helper, Letter Word Count & Reading Time tool, and Stamp Quantity Calculator give curated, educational estimates — not official postal quotes or guarantees. For anything that must be exact, confirm the live price and rules at the post office or your carrier, as our Disclaimerexplains. PostKid is independent and not affiliated with any postal service or stationery brand.

Using the Site Fairly

By using PostKid, you agree to:

Because PostKid is designed for children, we ask that a parent, guardian, or teacher supervise its use and apply their own judgement about what is suitable and safe for a particular child.

A Grown-Up’s Judgement Comes First

The tools assist and inform; they do not replace a responsible adult’s judgement. You’re responsible for double-checking anything that matters — the exact postage on an important package, or a specific mailing rule — with the post office or carrier before you rely on it.

Intellectual Property

The text, graphics, and tools on this site are PostKid’s property or used with permission, except museum and learn content sourced from Wikipedia and Wikimedia Commons under their public-domain and Creative Commons licenses. You may use the tools for personal, non-commercial purposes; please don’t copy, resell, or reverse-engineer the site.

Privacy

Your use of the site is also governed by our Privacy Policy. All tool calculations happen in your browser and are not transmitted to us.

Limitation of Liability

To the maximum extent permitted by law, PostKid is not liable for any damages — such as extra postage paid, a returned or delayed letter, or lost data — arising from use of, or inability to use, the site and its tools.

Third-Party Links and Ads

The site may link to third-party websites and displays advertisements from networks including Google AdSense. We don’t control or endorse third-party content, and use of any linked site is at your own risk.

Governing Law

These terms are governed by the laws of the United States, and you agree to the exclusive jurisdiction of its courts.

Contact

Questions about these Terms?