Terms of Use

Last updated: May 21, 2026

These terms cover your use of Prime Calculation. By using the site, you agree to them. If you do not agree, please stop using the site.

Using the site

The calculators and tools are free to use. You do not need an account. You may use them for personal or business purposes, as long as you follow these terms and the law.

Estimates, not professional advice

Every result is an estimate for general information. It is not financial, legal, medical, tax, engineering, or other professional advice. Before you make an important decision, check the numbers with a qualified professional or an authoritative source.

Accuracy and availability

We work to keep the formulas correct and cite our sources, yet we cannot promise every result is free of error. We provide the site on an as is and as available basis, and we may change, pause, or remove any tool at any time.

Limitation of liability

You use this site at your own risk. To the extent the law allows, Prime Calculation is not liable for any loss or damage that results from using the site or relying on a result, including lost money, lost data, or lost time.

Acceptable use

Do not misuse the site. Do not try to break it, overload it, scrape it at scale, or use it to break the law. We may limit or block access that threatens the service or other people.

Intellectual property

The site name, design, text, and code belong to Prime Calculation, except for sources we quote and credit. You may use the tools and share links to them. Do not copy the site wholesale or pass it off as your own.

External links

Some pages link to outside websites we cite. We do not control those sites and are not responsible for their content or their terms.

Changes to these terms

We may update these terms as the site changes. When we do, we will revise the date at the top of this page. Continued use after a change means you accept the new terms.

Contact

Prime Calculation operates this website. If we add a contact channel, we will list it on this page. See also our Privacy Policy and Legal Information.