Terms of Use

By accessing or using NumberChan, visitors acknowledge that they have read and agree to these Terms of Use. Visitors who do not agree should discontinue using the website.

NumberChan provides free mathematical, financial, and operational calculators. No account, registration, subscription, or payment is required.

NumberChan reserves the right to modify, suspend, discontinue, or restrict any feature or part of the website.

Visitors may use the website for lawful personal and business informational purposes. Visitors must not:

• Attempt unauthorized access to the website or its infrastructure.
• Interfere with website functionality or security.
• Introduce malicious code or harmful software.
• Abuse, overload, or disrupt the service.
• Scrape or reproduce substantial portions of the website through unauthorized automated methods.
• Use the website for unlawful purposes.

All calculator results are estimates based on user-provided inputs and the formulas or assumptions used by the relevant calculator. Visitors are responsible for checking their inputs and independently verifying important results. See the Disclaimer.

NumberChan does not provide personalized financial, investment, accounting, tax, legal, or professional advice. The website is an informational mathematical utility and must not be treated as a substitute for qualified professional advice.

NumberChan’s original branding, website design, text, graphics, educational materials, and original content are protected by applicable intellectual property laws.

Visitors may use the calculators for their intended purposes but may not reproduce, redistribute, or commercially exploit substantial portions of the website’s original content without authorization, except where permitted by law.

NumberChan may display advertisements provided by third-party advertising providers. The appearance of an advertisement does not constitute an endorsement, recommendation, or guarantee by NumberChan.

External websites and services operate independently and are subject to their own terms and privacy policies. See Cookies & Advertising.

NumberChan is provided on an as-is and as-available basis. We do not guarantee continuous availability, uninterrupted operation, compatibility with every device, or freedom from technical errors.

To the fullest extent permitted by applicable law, NumberChan disclaims express and implied warranties, including warranties of accuracy, reliability, merchantability, and fitness for a particular purpose.

To the fullest extent permitted by applicable law, NumberChan and its operators shall not be liable for indirect, incidental, consequential, special, or punitive damages arising from the use of, inability to use, or reliance upon the website or its calculator results.

Nothing in these Terms excludes liability that cannot legally be excluded or limited.

NumberChan is an independent self-service utility website. No individual customer support, telephone assistance, live chat, general correspondence, or personal consultation service is provided. Visitors should not expect individual responses or assistance.

Nothing in this section removes any mandatory legal rights or obligations.

These Terms may be updated when website functionality, services, or applicable legal requirements change. The latest version will be published on this page.

If any provision is found unenforceable, the remaining provisions shall continue to apply to the extent permitted by law.