These Terms and Conditions apply to your use of Zayvora Calculators and its calculators, guides and other content. Please read them before you use the site.
Acceptance of these terms
By visiting or using this site, you agree to these terms. If you do not agree, please do not use the site. We may change the terms from time to time, as described below.
Use of the site and calculators
You may use the site and its calculators for lawful purposes and for your own personal or business use. You agree not to misuse the site. For example, you agree not to try to disrupt it, to attack it, to overload it with automated requests, or to use it to break the law or the rights of others.
Calculators are provided as-is
The calculators and all other content are provided “as is” and “as available”, without any warranty of any kind, whether express or implied. We do not promise that the tools will always work, will be free of errors or will meet your needs. We try to make the calculators accurate and we check them against worked examples, but errors can still happen.
No professional advice
Nothing on this site is financial, tax, legal, engineering, construction, veterinary or other professional advice. Results are estimates for information only. Before you make a decision that matters, check the figures with official sources and ask a qualified professional. Please also read our Disclaimer.
Limitation of liability
To the fullest extent allowed by the law that applies to you, the owner of this site will not be liable for any loss or damage, whether direct or indirect, that comes from your use of the site or from relying on a calculator result. This includes loss of money, profit, data or opportunity, and any cost of materials or work that you order on the basis of a result. You use the site and its results at your own risk.
Nothing in these terms limits any right you have that cannot be limited by law.
Third-party names and links
The site may mention names such as eBay, Etsy and other marketplaces or companies. These names are trademarks of their respective owners. This site is not affiliated with or endorsed by them. The site may also link to other websites. We do not control those sites and we are not responsible for their content or practices.
Intellectual property
The text, layout, design and tools on this site belong to the site owner. You may use the calculators for yourself and share links to our pages. You may not copy the tools, the code or the content, or resell or republish them, without our permission. To ask for permission, please use the Contact form.
Feedback
If you send us a suggestion or an error report through the contact form, we may use it to improve the site, and we will not owe you anything for it.
Availability and changes to the site
We may change, pause or remove any calculator or page at any time, without notice. We do not promise that the site will always be available.
Changes to these terms
We may update these terms from time to time. When we do, we will change the “Last updated” date at the bottom of this page. If you keep using the site after a change, that means you accept the new terms.
Contact
If you have questions about these terms, please use the Contact form. For common questions about the tools, see the FAQ page.
Last updated: October 2026