Terms of Use

Last updated: 2026-11-04. By using Gem Carat Calculator you agree to these terms.

Use of the tools

You may use the calculators, charts and guides free of charge for personal and commercial purposes, including describing stones in your own listings. Results are estimates. You are responsible for how you use them. See the disclaimer.

Content and copyright

The text, generated charts, illustrations and code of this site are original and protected by copyright. You may quote short passages and individual figures with a link back to the source page. Please do not republish whole pages or charts without permission. Physical constants and published formulas are facts and are free for anyone to use.

Acceptable use

Do not attempt to disrupt the site, scrape it in a way that harms its performance, or use it for unlawful purposes.

No warranty

The site is provided "as is", without warranties of any kind, to the extent permitted by law.

Limitation of liability

To the extent permitted by law, we are not liable for indirect or consequential loss, or any loss arising from reliance on estimates, arising from your use of the site.

Links

We are not responsible for the content of external sites we link to.

Changes and contact

We may update these terms. The date above shows the latest version. Questions: contact us.