Last updated: September 28, 2026
Welcome to jonathankellman.com. By using this website, including its calculators, converters, and music tools, you agree to the terms below. If you do not agree, please do not use the site.
About This Site
This site is operated by Jonathan S. Kellman. It offers free online calculators, converters, and music tools, along with informational content. Everything here is provided for general informational and educational purposes.
Informational and Educational Use Only
The tools and content on this site are not professional advice of any kind. In particular:
- Financial tools (loan, interest, APR, compound interest, currency, tax, tip, and similar calculators) give estimates only. Actual lender terms, taxes, fees, and exchange rates can differ. Consult a qualified financial professional before making financial decisions.
- Health tools (BMI, healthy weight range, and similar calculators) give general reference numbers only. They are not medical advice, a diagnosis, or a treatment recommendation. Talk to a licensed healthcare provider about your health.
- Travel and time tools (flight landing time, time zone, and travel money calculators) are planning aids. Always confirm times, currency rates, and airline limits with the official source before you travel.
- Music tools (tuning, tempo, string tension, capo, and similar calculators) give estimates for practice and planning. Real-world results depend on your instrument, equipment, and setup.
Accuracy of Results
I work to make the calculators accurate, but I do not guarantee that results are complete, current, or error-free. Rounding, simplified formulas, live data from third-party sources, and unusual inputs can all cause results to differ from real-world figures. You are responsible for checking any result before relying on it.
No Warranty
The site and all tools are provided "as is" and "as available," without warranties of any kind, express or implied, including fitness for a particular purpose. I do not promise that the site will be uninterrupted, secure, or free of errors.
Limitation of Liability
To the fullest extent permitted by law, Jonathan S. Kellman and this website are not liable for any loss or damage arising from your use of, or inability to use, the site or its tools, including decisions made based on a calculator result.
Acceptable Use
Please do not misuse the site. That includes attempting to disrupt or overload it, scraping it in a way that harms its performance, attempting unauthorized access, or using it for any unlawful purpose.
Third-Party Links, Advertising, and Affiliate Disclosures
The site may link to third-party websites and may display advertising or include affiliate links. I do not control third-party sites and am not responsible for their content or practices. See the Privacy Policy for how information is collected and used, including cookies and advertising.
Intellectual Property
The text, design, and tools on this site are owned by Jonathan S. Kellman unless otherwise noted. You may use the tools for personal, non-commercial purposes. Please do not copy, republish, or redistribute site content without permission.
Changes to These Terms
I may update these terms from time to time. The "Last updated" date at the top shows when they last changed. Continued use of the site after changes means you accept the updated terms.
Contact
Questions about these terms can be sent to caseymorgan.wellness@gmail.com or through the [Contact](/contact/) page.