Numerandi

Small tools that do one job well

Terms of use

Effective date: September 1, 2026

These terms govern your use of Numerandi, operated by Numerandi / Chris Mitchell. By using the site, you agree to these terms. If you do not agree, do not use the site.

Informational tools

Numerandi provides small calculators and related explanations for general informational purposes. Results depend on the values you enter and the assumptions described on each tool page. They are not financial, legal, medical, tax, engineering, or other professional advice. Verify important results independently and consult a qualified professional when appropriate.

Your use of the site

You may use Numerandi for lawful personal or business purposes. You must not interfere with the site's operation, attempt to bypass its security, use automated requests in a way that degrades service for others, or misrepresent Numerandi content as professional advice.

Availability and accuracy

Numerandi aims to provide clear formulas and accurate working, but the site and its results are provided “as is” and “as available.” Features may change or be withdrawn. To the fullest extent permitted by law, Numerandi disclaims warranties of accuracy, fitness for a particular purpose, and uninterrupted availability.

Liability

To the fullest extent permitted by law, Numerandi / Chris Mitchell will not be liable for indirect, incidental, special, or consequential loss arising from use of the site or reliance on a result. Nothing in these terms excludes liability that cannot legally be excluded.

Intellectual property and advertising

The Numerandi name, site design, original explanations, and source material are protected by applicable intellectual-property laws. Third-party names remain the property of their owners. The site may display advertising in the future; an advertisement does not constitute Numerandi's endorsement of the advertiser.

Changes

These terms may be updated as Numerandi evolves. The effective date above will change when revised terms are published. Continued use after an update means you accept the revised terms.