Terms and Conditions

By using PercentBase you agree to these terms. If you do not agree with them, please do not use the site.

1. Use of the site

PercentBase provides free online calculators for general informational and educational purposes. You may use the site for personal, educational or commercial purposes, subject to the restrictions below.

2. Acceptable use

You agree not to:

• Attempt to gain unauthorised access to the site, its server or any connected system.
• Interfere with the site's operation, including through automated requests that place unreasonable load on it.
• Copy substantial portions of the site's content or code for republication as your own.
• Use the site in any way that is unlawful, fraudulent or harmful to others.

3. No professional advice

The calculators and written content on this site are tools and general information. They do not constitute financial, tax, accounting, legal, academic or professional advice, and should not be relied upon as a substitute for advice from a qualified professional who knows your circumstances. See our disclaimer for detail.

4. Accuracy

We take accuracy seriously: every formula is covered by an automated test suite, and results are shown with their working so you can verify them. Even so, we do not warrant that the site is free from errors, and you are responsible for checking any result before acting on it, particularly where money or grades are involved.

5. Availability

The site is provided on an "as is" and "as available" basis. We do not guarantee uninterrupted access, and we may change, suspend or withdraw any part of the site at any time without notice.

6. Intellectual property

The design, written content, code and branding of this site are original works owned by PercentBase and are protected by copyright. You may link to any page freely, and you may quote short extracts with attribution and a link. You may not republish substantial portions of the content or code without written permission.

Mathematical formulas themselves are not owned by anyone and are free for you to use.

7. Advertising

This site displays third-party advertising. We do not control, endorse or take responsibility for the content of those advertisements or for the products and services they promote. Any dealings you have with an advertiser are between you and them.

8. Third-party links

Links to external sites are provided for convenience. We are not responsible for their content, accuracy, availability or privacy practices.

9. Limitation of liability

To the fullest extent permitted by law, PercentBase shall not be liable for any loss or damage — including financial loss, loss of data, loss of profits, or academic consequences — arising from your use of, or inability to use, this site or any result produced by it. Nothing in these terms limits liability that cannot lawfully be limited.

10. Changes to these terms

We may update these terms from time to time. The current version always appears on this page with its date, and continued use of the site after a change means you accept the revised terms.

11. Contact

Questions about these terms can be sent to hello@percentbase.com.